Little known to the general public and acclaimed in the automobile industry for its ability to limit pollution, rhodium has recently seen its price soar, to the point of being considered as the “most expensive metal in the world”.
Its price has almost doubled since January 1, from $ 6,000 to $ 11,500 an ounce on Friday, according to the price published twice a day by the chemical group Johnson Matthey. Seven times more than gold.
What is rhodium?
Rhodium is a silvery white metal from the platinoid family, "silver-like in appearance, very hard and very resistant to corrosion", explains John Plassard, market specialist at Mirabaud, to AFP.
"There are no rhodium mines per se", he adds, rhodium being a by-product of the extraction of platinum or nickel.
Regarded as a rare metal, rhodium does not belong to the category of “rare earths”, this set of 17 metals supplied 95% by China and essential to a series of technological products.
What is it used for?
Rhodium "is one of those metals that help transform the automotive sector," says Plassard.
It is mainly used by the automotive industry in the manufacture of exhaust catalysts - or catalytic converters - because it limits the emission of polluting gases, in particular nitrogen oxide (NOx).
Rhodium also finds uses in chemistry and in the composition of jewelry, as certain necklaces or bracelets of the Swarovski jeweler.
Where is it found?
South Africa extracted between 80% and 85% of world production in 2019, according to a report published Wednesday by Johnson Matthey, the rest being shared between Russia and all the other countries of the world.
Total production has amounted to around 26 tonnes per year over the past three years, to which are added between 10 and 13 tonnes of recycled rhodium, according to the same report.
The extraction conditions "are not exempt from certain risks", recalls Mr. Plassard, who points out "the potentially carcinogenic toxicity of this type of metal".
Why is it so expensive?
Its rarity and the dependence of its supply on an extraction zone are among the main factors of the high cost of rhodium.
Strong demand from the automobile industry, driven by anti-pollution measures, in Europe, but also in China, increased last year (+ 14%), generating a market deficit situation.
In addition, "the interest of investors in search of new safe havens has also driven prices up," adds Mr. Plassard.
If the prospects for its price are good for 2020 - Johnson Matthey expects an increase in the supply deficit - some analysts warn about the speculative side and recall the downside of rhodium in 2008, whose price had been abruptly divided by ten between June and November.
Is it the only metal whose price takes off this year?
Metal prices have suffered rather since January 1 because of fears weighing on Chinese demand, the first importer of raw materials being prey to an epidemic of viral pneumonia which constrains its economy and threatens to weigh on its growth.
But some are doing well: palladium has gained almost 25% since the start of the year, also driven by demand from the automotive industry, and to a lesser extent gold, supported by its status of refuge value.
The ounce of palladium traded Friday on the London Metal Exchange around 2435 dollars per ounce, against about 1580 dollar for the ounce of yellow metal.
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Sunday, February 23, 2020
Thursday, June 23, 2016
Nickel chemical element
Nickel was discovered by Axel Fredrik Cronstedt in 1751.
The chemical symbol for Nickel is Ni and its atomic number is 28.
We find it listed in the periodic table of elements in group 10 and period 4, and block d.
Nickel belongs to the family of transition metals such as for example the Silver, the Bohrium, cadmium, ...
This element is stable.
Atomic number (Z) 28
Group, block group 10, d-block
Period: period 4
Element category: transition metal
Standard atomic weight (±) (Ar) 58.6934(4)
Electron configuration: [Ar] 3d8 4s2 or [Ar] 3d9 4s1
per shell: 2, 8, 16, 2 or 2, 8, 17, 1
Physical properties
Phase: solid
Melting point: 1728 K (1455 °C, 2651 °F)
Boiling point: 3003 K (2730 °C, 4946 °F)
Density near r.t. : 8.908 g/cm3
when liquid, at m.p. 7.81 g/cm3
Heat of fusion: 17.48 kJ/mol
Heat of vaporization: 379 kJ/mol
Molar heat capacity: 26.07 J/(mol·K)
Atomic properties
Oxidation states: 4, 3, 2, 1, −1, −2 (a mildly basic oxide)
Electronegativity: Pauling scale: 1.91
Ionization energies 1st: 737.1 kJ/mol
2nd: 1753.0 kJ/mol
3rd: 3395 kJ/mol
Atomic radius empirical: 124 pm
Covalent radius: 124±4 pm
Van der Waals radius: 163 pm
Element crystal structure: face-centered cubic.
Speed of sound thin rod: 4900 m/s (at r.t.)
Thermal expansion: 13.4 µm/(m·K) (at 25 °C)
Thermal conductivity: 90.9 W/(m·K)
Electrical resistivity: 69.3 nΩ·m (at 20 °C)
Magnetic ordering: ferromagnetic
Young's modulus: 200 GPa
Shear modulus: 76 GPa
Bulk modulus: 180 GPa
Poisson ratio: 0.31
Mohs hardness: 4.0
Vickers hardness: 638 MPa
Brinell hardness: 667–1600 MPa
CAS Number: 7440-02-0
The chemical symbol for Nickel is Ni and its atomic number is 28.
We find it listed in the periodic table of elements in group 10 and period 4, and block d.
Nickel belongs to the family of transition metals such as for example the Silver, the Bohrium, cadmium, ...
This element is stable.
Atomic number (Z) 28
Group, block group 10, d-block
Period: period 4
Element category: transition metal
Standard atomic weight (±) (Ar) 58.6934(4)
Electron configuration: [Ar] 3d8 4s2 or [Ar] 3d9 4s1
per shell: 2, 8, 16, 2 or 2, 8, 17, 1
Physical properties
Phase: solid
Melting point: 1728 K (1455 °C, 2651 °F)
Boiling point: 3003 K (2730 °C, 4946 °F)
Density near r.t. : 8.908 g/cm3
when liquid, at m.p. 7.81 g/cm3
Heat of fusion: 17.48 kJ/mol
Heat of vaporization: 379 kJ/mol
Molar heat capacity: 26.07 J/(mol·K)
Atomic properties
Oxidation states: 4, 3, 2, 1, −1, −2 (a mildly basic oxide)
Electronegativity: Pauling scale: 1.91
Ionization energies 1st: 737.1 kJ/mol
2nd: 1753.0 kJ/mol
3rd: 3395 kJ/mol
Atomic radius empirical: 124 pm
Covalent radius: 124±4 pm
Van der Waals radius: 163 pm
Element crystal structure: face-centered cubic.
Speed of sound thin rod: 4900 m/s (at r.t.)
Thermal expansion: 13.4 µm/(m·K) (at 25 °C)
Thermal conductivity: 90.9 W/(m·K)
Electrical resistivity: 69.3 nΩ·m (at 20 °C)
Magnetic ordering: ferromagnetic
Young's modulus: 200 GPa
Shear modulus: 76 GPa
Bulk modulus: 180 GPa
Poisson ratio: 0.31
Mohs hardness: 4.0
Vickers hardness: 638 MPa
Brinell hardness: 667–1600 MPa
CAS Number: 7440-02-0
Meitnerium chemical element
Meitnerium was discovered by Peter Armbruster, Gottfried Münzenber and researchers from the GIS laboratory.
The chemical symbol for Meitnerium is Mt and its atomic number is 109.
We find it listed in the periodic table in Group 9 and 7 period and block d.
The Meitnerium belongs to the family of transition metals such as for example the Silver, the Bohrium, cadmium, ...
This element is Radioactive
Meitnerium was named after Lise Meitner.
Atomic number (Z) 109
Group, block group 9, d-block
Period: period 7
Element category: unknown, but probably a transition metal
Standard atomic weight (Ar) [278]
Electron configuration: [Rn] 5f14 6d7 7s2 (calculated)
per shell: 2, 8, 18, 32, 32, 15, 2 (predicted)
Physical properties
Phase: solid (predicted)
Density near r.t. : 37.4 g/cm3 (predicted)
Atomic properties
Oxidation states: 9, 8, 6, 4, 3, 1 (predicted)
Ionization energies 1st: 800.8 kJ/mol
2nd: 1823.6 kJ/mol
3rd: 2904.2 kJ/mol (all estimated)
Atomic radius empirical: 128 pm (predicted)
Covalent radius: 129 pm (estimated)
Element crystal structure: face-centered cubic (predicted)
Magnetic ordering: paramagnetic (predicted)
CAS Number: 54038-01-6
The chemical symbol for Meitnerium is Mt and its atomic number is 109.
We find it listed in the periodic table in Group 9 and 7 period and block d.
The Meitnerium belongs to the family of transition metals such as for example the Silver, the Bohrium, cadmium, ...
This element is Radioactive
Meitnerium was named after Lise Meitner.
Atomic number (Z) 109
Group, block group 9, d-block
Period: period 7
Element category: unknown, but probably a transition metal
Standard atomic weight (Ar) [278]
Electron configuration: [Rn] 5f14 6d7 7s2 (calculated)
per shell: 2, 8, 18, 32, 32, 15, 2 (predicted)
Physical properties
Phase: solid (predicted)
Density near r.t. : 37.4 g/cm3 (predicted)
Atomic properties
Oxidation states: 9, 8, 6, 4, 3, 1 (predicted)
Ionization energies 1st: 800.8 kJ/mol
2nd: 1823.6 kJ/mol
3rd: 2904.2 kJ/mol (all estimated)
Atomic radius empirical: 128 pm (predicted)
Covalent radius: 129 pm (estimated)
Element crystal structure: face-centered cubic (predicted)
Magnetic ordering: paramagnetic (predicted)
CAS Number: 54038-01-6
Iridium chemical element
Iridium was discovered in 1803 by Smithson Tennant.
The chemical symbol for Iridium is Ir and its atomic number is 77.
We find it listed in the periodic table in Group 9 and 6 period and block d.
The Iridium belongs to the family of transition metals such as for example the Silver, the Bohrium, cadmium, ...
This element is stable.
Iridium as a name came from the latin word iridos which means rainbow.
Atomic number (Z) 77
Group, block group 9, d-block
Period: period 6
Element category: transition metal
Standard atomic weight (±) (Ar) 192.217(3)
Electron configuration [Xe] 4f14 5d7 6s2
per shell: 2, 8, 18, 32, 15, 2
Physical properties
Phase: solid
Melting point: 2719 K (2446 °C, 4435 °F)
Boiling point: 4403 K (4130 °C, 7466 °F)
Density near r.t. : 22.56 g/cm3
when liquid, at m.p. 19 g/cm3
Heat of fusion: 41.12 kJ/mol
Heat of vaporization: 564 kJ/mol
Molar heat capacity: 25.10 J/(mol·K)
Atomic properties
Oxidation states: −3, −1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9
Electronegativity: Pauling scale: 2.20
Ionization energies 1st: 880 kJ/mol
2nd: 1600 kJ/mol
Atomic radius empirical: 136 pm
Covalent radius: 141±6 pm
Element Crystal structure: face-centered cubic
Speed of sound thin rod: 4825 m/s (at 20 °C)
Thermal expansion: 6.4 µm/(m·K)
Thermal conductivity: 147 W/(m·K)
Electrical resistivity: 47.1 nΩ·m (at 20 °C)
Magnetic ordering: paramagnetic
Young's modulus: 528 GPa
Shear modulus : 210 GPa
Bulk modulus: 320 GPa
Poisson ratio: 0.26
Mohs hardness: 6.5
Vickers hardness: 1760–2200 MPa
Brinell hardness: 1670 MPa
CAS Number: 7439-88-5
The chemical symbol for Iridium is Ir and its atomic number is 77.
We find it listed in the periodic table in Group 9 and 6 period and block d.
The Iridium belongs to the family of transition metals such as for example the Silver, the Bohrium, cadmium, ...
This element is stable.
Iridium as a name came from the latin word iridos which means rainbow.
Atomic number (Z) 77
Group, block group 9, d-block
Period: period 6
Element category: transition metal
Standard atomic weight (±) (Ar) 192.217(3)
Electron configuration [Xe] 4f14 5d7 6s2
per shell: 2, 8, 18, 32, 15, 2
Physical properties
Phase: solid
Melting point: 2719 K (2446 °C, 4435 °F)
Boiling point: 4403 K (4130 °C, 7466 °F)
Density near r.t. : 22.56 g/cm3
when liquid, at m.p. 19 g/cm3
Heat of fusion: 41.12 kJ/mol
Heat of vaporization: 564 kJ/mol
Molar heat capacity: 25.10 J/(mol·K)
Atomic properties
Oxidation states: −3, −1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9
Electronegativity: Pauling scale: 2.20
Ionization energies 1st: 880 kJ/mol
2nd: 1600 kJ/mol
Atomic radius empirical: 136 pm
Covalent radius: 141±6 pm
Element Crystal structure: face-centered cubic
Speed of sound thin rod: 4825 m/s (at 20 °C)
Thermal expansion: 6.4 µm/(m·K)
Thermal conductivity: 147 W/(m·K)
Electrical resistivity: 47.1 nΩ·m (at 20 °C)
Magnetic ordering: paramagnetic
Young's modulus: 528 GPa
Shear modulus : 210 GPa
Bulk modulus: 320 GPa
Poisson ratio: 0.26
Mohs hardness: 6.5
Vickers hardness: 1760–2200 MPa
Brinell hardness: 1670 MPa
CAS Number: 7439-88-5
Rhodium chemical element
Rhodium was discovered by William Hyde Wollaston in 1803.
The chemical symbol for Rhodium is Rh and its atomic number is 45.
We find it listed in the periodic table in Group 9 and period 5 and block d.
Rhodium belongs to the family of transition metals such as for example the Silver, the Bohrium, cadmium, ...
This element is stable.
Rhodium as a name came from the greek word rhodon which means pink.
Atomic number (Z) 45
Group, block group 9, d-block
Period: period 5
Element category: transition metal
Standard atomic weight (±) (Ar) 102.90550(2)
Electron configuration: [Kr] 4d8 5s1
per shell: 2, 8, 18, 16, 1
Physical properties
Phase: solid
Melting point: 2237 K (1964 °C, 3567 °F)
Boiling point: 3968 K (3695 °C, 6683 °F)
Density near r.t. : 12.41 g/cm3
when liquid, at m.p. 10.7 g/cm3
Heat of fusion: 26.59 kJ/mol
Heat of vaporization: 493 kJ/mol
Molar heat capacity: 24.98 J/(mol·K)
Atomic properties
Oxidation states: 6, 5, 4, 3, 2, 1, −1, −3 (an amphoteric oxide)
Electronegativity: Pauling scale: 2.28
Ionization energies 1st: 719.7 kJ/mol
2nd: 1740 kJ/mol
3rd: 2997 kJ/mol
Atomic radius empirical: 134 pm
Covalent radius: 142±7 pm
Element Crystal structure: face-centered cubic
Speed of sound thin rod: 4700 m/s (at 20 °C)
Thermal expansion 8.2 µm/(m·K) (at 25 °C)
Thermal conductivity: 150 W/(m·K)
Electrical resistivity: 43.3 nΩ·m (at 0 °C)
Magnetic ordering: paramagnetic
Young's modulus:380 GPa
Shear modulus: 150 GPa
Bulk modulus: 275 GPa
Poisson ratio: 0.26
Mohs hardness: 6.0
Vickers hardness: 1100–8000 MPa
Brinell hardness: 980–1350 MPa
CAS Number: 7440-16-6
The chemical symbol for Rhodium is Rh and its atomic number is 45.
We find it listed in the periodic table in Group 9 and period 5 and block d.
Rhodium belongs to the family of transition metals such as for example the Silver, the Bohrium, cadmium, ...
This element is stable.
Rhodium as a name came from the greek word rhodon which means pink.
Atomic number (Z) 45
Group, block group 9, d-block
Period: period 5
Element category: transition metal
Standard atomic weight (±) (Ar) 102.90550(2)
Electron configuration: [Kr] 4d8 5s1
per shell: 2, 8, 18, 16, 1
Physical properties
Phase: solid
Melting point: 2237 K (1964 °C, 3567 °F)
Boiling point: 3968 K (3695 °C, 6683 °F)
Density near r.t. : 12.41 g/cm3
when liquid, at m.p. 10.7 g/cm3
Heat of fusion: 26.59 kJ/mol
Heat of vaporization: 493 kJ/mol
Molar heat capacity: 24.98 J/(mol·K)
Atomic properties
Oxidation states: 6, 5, 4, 3, 2, 1, −1, −3 (an amphoteric oxide)
Electronegativity: Pauling scale: 2.28
Ionization energies 1st: 719.7 kJ/mol
2nd: 1740 kJ/mol
3rd: 2997 kJ/mol
Atomic radius empirical: 134 pm
Covalent radius: 142±7 pm
Element Crystal structure: face-centered cubic
Speed of sound thin rod: 4700 m/s (at 20 °C)
Thermal expansion 8.2 µm/(m·K) (at 25 °C)
Thermal conductivity: 150 W/(m·K)
Electrical resistivity: 43.3 nΩ·m (at 0 °C)
Magnetic ordering: paramagnetic
Young's modulus:380 GPa
Shear modulus: 150 GPa
Bulk modulus: 275 GPa
Poisson ratio: 0.26
Mohs hardness: 6.0
Vickers hardness: 1100–8000 MPa
Brinell hardness: 980–1350 MPa
CAS Number: 7440-16-6
Cobalt chemical element
Cobalt was discovered in 1735 by Georg Brandt.
The chemical symbol for Cobalt is Co and its atomic number is 27.
We find it listed in the periodic table in Group 9 and period 4, and block d.
Cobalt belongs to the family of transition metals such as for example the Silver, the Bohrium, cadmium, ...
This element is stable.
Atomic number (Z) 27
Group, block group 9, d-block
Period: period 4
Element category: transition metal
Standard atomic weight (±) (Ar) 58.933194(4)
Electron configuration [Ar] 3d7 4s2
per shell: 2, 8, 15, 2
Physical properties
Color: metallic gray
Phase: solid
Melting point: 1768 K (1495 °C, 2723 °F)
Boiling point: 3200 K (2927 °C, 5301 °F)
Density near r.t. : 8.90 g/cm3
when liquid, at m.p. 8.86 g/cm3
Heat of fusion: 16.06 kJ/mol
Heat of vaporization: 377 kJ/mol
Molar heat capacity: 24.81 J/(mol·K)
Atomic properties
Oxidation states: −3, −1, +1, +2, +3, +4, +5 (an amphoteric oxide)
Electronegativity: Pauling scale: 1.88
Ionization energies 1st: 760.4 kJ/mol
2nd: 1648 kJ/mol
3rd: 3232 kJ/mol
Atomic radius empirical: 125 pm
Covalent radius: Low spin: 126±3 pm
High spin: 150±7 pm
Element Crystal structure: hexagonal close-packed
Speed of sound thin rod: 4720 m/s (at 20 °C)
Thermal expansion: 13.0 µm/(m·K) (at 25 °C)
Thermal conductivity: 100 W/(m·K)
Electrical resistivity: 62.4 nΩ·m (at 20 °C)
Magnetic ordering: ferromagnetic
Young's modulus: 209 GPa
Shear modulus : 75 GPa
Bulk modulus: 180 GPa
Poisson ratio: 0.31
Mohs hardness: 5.0
Vickers hardness: 1043 MPa
Brinell hardness: 470–3000 MPa
CAS Number: 7440-48-4
The chemical symbol for Cobalt is Co and its atomic number is 27.
We find it listed in the periodic table in Group 9 and period 4, and block d.
Cobalt belongs to the family of transition metals such as for example the Silver, the Bohrium, cadmium, ...
This element is stable.
Atomic number (Z) 27
Group, block group 9, d-block
Period: period 4
Element category: transition metal
Standard atomic weight (±) (Ar) 58.933194(4)
Electron configuration [Ar] 3d7 4s2
per shell: 2, 8, 15, 2
Physical properties
Color: metallic gray
Phase: solid
Melting point: 1768 K (1495 °C, 2723 °F)
Boiling point: 3200 K (2927 °C, 5301 °F)
Density near r.t. : 8.90 g/cm3
when liquid, at m.p. 8.86 g/cm3
Heat of fusion: 16.06 kJ/mol
Heat of vaporization: 377 kJ/mol
Molar heat capacity: 24.81 J/(mol·K)
Atomic properties
Oxidation states: −3, −1, +1, +2, +3, +4, +5 (an amphoteric oxide)
Electronegativity: Pauling scale: 1.88
Ionization energies 1st: 760.4 kJ/mol
2nd: 1648 kJ/mol
3rd: 3232 kJ/mol
Atomic radius empirical: 125 pm
Covalent radius: Low spin: 126±3 pm
High spin: 150±7 pm
Element Crystal structure: hexagonal close-packed
Speed of sound thin rod: 4720 m/s (at 20 °C)
Thermal expansion: 13.0 µm/(m·K) (at 25 °C)
Thermal conductivity: 100 W/(m·K)
Electrical resistivity: 62.4 nΩ·m (at 20 °C)
Magnetic ordering: ferromagnetic
Young's modulus: 209 GPa
Shear modulus : 75 GPa
Bulk modulus: 180 GPa
Poisson ratio: 0.31
Mohs hardness: 5.0
Vickers hardness: 1043 MPa
Brinell hardness: 470–3000 MPa
CAS Number: 7440-48-4
Wednesday, June 22, 2016
Hassium chemical element
Hassium was discovered in 1984 by Peter Armbruster, Gottfried Münzenber and researchers from the GSI Laboratory.
The chemical symbol for Hassium is Hs and its atomic number is 108.
We find it listed in the periodic table of elements in group 8 and period 7 and block.
The Hassium belongs to the family of transition metals such as for example the Silver, the Bohrium, cadmium, ...
This element is Radioactive.
Hassium was named after a region in germany where this metal is abundant.
Atomic number (Z) 108
Group, block group 8, d-block
Period: period 7
Element category: transition metal
Standard atomic weight (Ar) [269]
Electron configuration: [Rn] 5f14 6d6 7s2 (predicted)
per shell: 2, 8, 18, 32, 32, 14, 2 (predicted)
Physical properties
Phase: solid (predicted)
Density near r.t. : 41 g/cm3 (predicted)
Atomic properties
Oxidation states: 8, (6), (5), (4), (3), (2) (parenthesized oxidation states are predictions)
Ionization energies 1st: 733.3 kJ/mol
2nd: 1756.0 kJ/mol
3rd: 2827.0 kJ/mol (all estimated)
Atomic radius empirical: 126 pm (estimated)
Covalent radius: 134 pm (estimated)
Crystal structure: hexagonal close-packed (predicted)
CAS Number: 54037-57-9
The chemical symbol for Hassium is Hs and its atomic number is 108.
We find it listed in the periodic table of elements in group 8 and period 7 and block.
The Hassium belongs to the family of transition metals such as for example the Silver, the Bohrium, cadmium, ...
This element is Radioactive.
Hassium was named after a region in germany where this metal is abundant.
Atomic number (Z) 108
Group, block group 8, d-block
Period: period 7
Element category: transition metal
Standard atomic weight (Ar) [269]
Electron configuration: [Rn] 5f14 6d6 7s2 (predicted)
per shell: 2, 8, 18, 32, 32, 14, 2 (predicted)
Physical properties
Phase: solid (predicted)
Density near r.t. : 41 g/cm3 (predicted)
Atomic properties
Oxidation states: 8, (6), (5), (4), (3), (2) (parenthesized oxidation states are predictions)
Ionization energies 1st: 733.3 kJ/mol
2nd: 1756.0 kJ/mol
3rd: 2827.0 kJ/mol (all estimated)
Atomic radius empirical: 126 pm (estimated)
Covalent radius: 134 pm (estimated)
Crystal structure: hexagonal close-packed (predicted)
CAS Number: 54037-57-9
Osmium chemical element
Osmium was discovered by Smithson Tennant in 1803.
The chemical symbol for Osmium is Os and its atomic number is 76.
We find it listed in the periodic table of elements in group 8 and period 6 and block.
The Osmium belongs to the family of transition metals such as for example the Silver, the Bohrium, cadmium, ...
This element is stable.
Atomic number (Z) 76
Group, block group 8, d-block
Period: period 6
Element category: transition metal
Standard atomic weight (±) (Ar) 190.23(3)
Electron configuration [Xe] 4f14 5d6 6s2
per shell: 2, 8, 18, 32, 14, 2
Physical properties
Phase: solid
Melting point: 3306 K (3033 °C, 5491 °F)
Boiling point: 5285 K (5012 °C, 9054 °F)
Density near r.t. : 22.59 g/cm3
when liquid, at m.p. 20 g/cm3
Heat of fusion: 31 kJ/mol
Heat of vaporization: 378 kJ/mol
Molar heat capacity: 24.7 J/(mol·K)
Atomic properties
Oxidation states; 8, 7, 6, 5, 4, 3, 2, 1, 0, −1, −2, −4 (a mildly acidic oxide)
Electronegativity: Pauling scale: 2.2
Ionization energies 1st: 840 kJ/mol
2nd: 1600 kJ/mol
Atomic radius empirical: 135 pm
Covalent radius: 144±4 pm
Crystal structure: hexagonal close-packed
Speed of sound thin rod: 4940 m/s (at 20 °C)
Thermal expansion: 5.1 µm/(m·K) (at 25 °C)
Thermal conductivity: 87.6 W/(m·K)
Electrical resistivity: 81.2 nΩ·m (at 0 °C)
Magnetic ordering: paramagnetic
Shear modulus : 222 GPa
Bulk modulus: 462 GPa
Poisson ratio/ 0.25
Mohs hardness: 7.0
Brinell hardness: 3490–4000 MPa
CAS Number: 7440-04-2
The chemical symbol for Osmium is Os and its atomic number is 76.
We find it listed in the periodic table of elements in group 8 and period 6 and block.
The Osmium belongs to the family of transition metals such as for example the Silver, the Bohrium, cadmium, ...
This element is stable.
Atomic number (Z) 76
Group, block group 8, d-block
Period: period 6
Element category: transition metal
Standard atomic weight (±) (Ar) 190.23(3)
Electron configuration [Xe] 4f14 5d6 6s2
per shell: 2, 8, 18, 32, 14, 2
Physical properties
Phase: solid
Melting point: 3306 K (3033 °C, 5491 °F)
Boiling point: 5285 K (5012 °C, 9054 °F)
Density near r.t. : 22.59 g/cm3
when liquid, at m.p. 20 g/cm3
Heat of fusion: 31 kJ/mol
Heat of vaporization: 378 kJ/mol
Molar heat capacity: 24.7 J/(mol·K)
Atomic properties
Oxidation states; 8, 7, 6, 5, 4, 3, 2, 1, 0, −1, −2, −4 (a mildly acidic oxide)
Electronegativity: Pauling scale: 2.2
Ionization energies 1st: 840 kJ/mol
2nd: 1600 kJ/mol
Atomic radius empirical: 135 pm
Covalent radius: 144±4 pm
Crystal structure: hexagonal close-packed
Speed of sound thin rod: 4940 m/s (at 20 °C)
Thermal expansion: 5.1 µm/(m·K) (at 25 °C)
Thermal conductivity: 87.6 W/(m·K)
Electrical resistivity: 81.2 nΩ·m (at 0 °C)
Magnetic ordering: paramagnetic
Shear modulus : 222 GPa
Bulk modulus: 462 GPa
Poisson ratio/ 0.25
Mohs hardness: 7.0
Brinell hardness: 3490–4000 MPa
CAS Number: 7440-04-2
Ruthenium chemical element
Ruthenium was discovered in 1844 by Karl Karlovich Klaus.
The chemical symbol for ruthenium is Ru and its atomic number is 44.
We find it listed in the periodic table of elements in group 8 and period 5 and block d.
Ruthenium belongs to the family of transition metals such as for example the Silver, the Bohrium, cadmium, ...
This element is stable.
Ruthenium as a name came from the latin word Ruthenia which means Russia.
Atomic number (Z) 44
Group, block group 8, d-block
Period: period 5
Element category: transition metal
Standard atomic weight (±) (Ar) 101.07(2)
Electron configuration [Kr] 4d7 5s1
per shell: 2, 8, 18, 15, 1
Physical properties
Melting point: 2607 K (2334 °C, 4233 °F)
Boiling point: 4423 K (4150 °C, 7502 °F)
Density near r.t. : 12.45 g/cm3
when liquid, at m.p. 10.65 g/cm3
Heat of fusion: 38.59 kJ/mol
Heat of vaporization: 619 kJ/mol
Molar heat capacity: 24.06 J/(mol·K)
Atomic properties
Oxidation states: -4, -2, 1, 2, 3, 4, 5, 6, 7, 8 (a mildly acidic oxide)
Electronegativity: Pauling scale: 2.2
Ionization energies 1st: 710.2 kJ/mol
2nd: 1620 kJ/mol
3rd: 2747 kJ/mol
Atomic radius empirical: 134 pm
Covalent radius: 146±7 pm
Crystal structure: hexagonal close-packed (hcp)
Speed of sound thin rod: 5970 m/s (at 20 °C)
Thermal expansion: 6.4 µm/(m·K) (at 25 °C)
Thermal conductivity: 117 W/(m·K)
Electrical resistivity: 71 nΩ·m (at 0 °C)
Magnetic ordering: paramagnetic
Young's modulus: 447 GPa
Shear modulus : 173 GPa
Bulk modulus: 220 GPa
Poisson ratio: 0.30
Mohs hardness: 6.5
Brinell hardness: 2160 MPa
CAS Number: 7440-18-8
The chemical symbol for ruthenium is Ru and its atomic number is 44.
We find it listed in the periodic table of elements in group 8 and period 5 and block d.
Ruthenium belongs to the family of transition metals such as for example the Silver, the Bohrium, cadmium, ...
This element is stable.
Ruthenium as a name came from the latin word Ruthenia which means Russia.
Atomic number (Z) 44
Group, block group 8, d-block
Period: period 5
Element category: transition metal
Standard atomic weight (±) (Ar) 101.07(2)
Electron configuration [Kr] 4d7 5s1
per shell: 2, 8, 18, 15, 1
Physical properties
Melting point: 2607 K (2334 °C, 4233 °F)
Boiling point: 4423 K (4150 °C, 7502 °F)
Density near r.t. : 12.45 g/cm3
when liquid, at m.p. 10.65 g/cm3
Heat of fusion: 38.59 kJ/mol
Heat of vaporization: 619 kJ/mol
Molar heat capacity: 24.06 J/(mol·K)
Atomic properties
Oxidation states: -4, -2, 1, 2, 3, 4, 5, 6, 7, 8 (a mildly acidic oxide)
Electronegativity: Pauling scale: 2.2
Ionization energies 1st: 710.2 kJ/mol
2nd: 1620 kJ/mol
3rd: 2747 kJ/mol
Atomic radius empirical: 134 pm
Covalent radius: 146±7 pm
Crystal structure: hexagonal close-packed (hcp)
Speed of sound thin rod: 5970 m/s (at 20 °C)
Thermal expansion: 6.4 µm/(m·K) (at 25 °C)
Thermal conductivity: 117 W/(m·K)
Electrical resistivity: 71 nΩ·m (at 0 °C)
Magnetic ordering: paramagnetic
Young's modulus: 447 GPa
Shear modulus : 173 GPa
Bulk modulus: 220 GPa
Poisson ratio: 0.30
Mohs hardness: 6.5
Brinell hardness: 2160 MPa
CAS Number: 7440-18-8
Iron chemical element
Iron was discovered by man around the stone age.
The chemical symbol for Iron is Fe and its atomic number is 26.
We find it listed in the periodic table of elements in group 8 and period 4, and block d.
Iron belongs to the family of transition metals such as for example the Silver, the Bohrium, cadmium, ...
This element is stable.
Atomic number (Z) 26
Group, block group 8, d-block
Period: period 4
Element category: transition metal
Standard atomic weight (±) (Ar) 55.845(2)
Electron configuration: [Ar] 3d6 4s2
per shell; 2, 8, 14, 2
Physical properties
Phase: solid
Melting point: 1811 K (1538 °C, 2800 °F)
Boiling point: 3134 K (2862 °C, 5182 °F)
Density near r.t. : 7.874 g/cm3
when liquid, at m.p. 6.98 g/cm3
Heat of fusion: 13.81 kJ/mol
Heat of vaporization: 340 kJ/mol
Molar heat capacity: 25.10 J/(mol·K)
Atomic properties
Oxidation states: −4, −2, −1, +1, +2, +3, +4, +5, +6 (an amphoteric oxide)
Electronegativity: Pauling scale: 1.83
Ionization energies 1st: 762.5 kJ/mol
2nd: 1561.9 kJ/mol
3rd: 2957 kJ/mol
Atomic radius empirical: 126 pm
Covalent radius: Low spin: 132±3 pm
High spin: 152±6 pm
Crystal structure: body-centered cubic a=286.65 pm
Crystal structure: face-centered cubic between 1185–1667 K
Speed of sound thin rod: 5120 m/s (at r.t.) (electrolytic)
Thermal expansion: 11.8 µm/(m·K) (at 25 °C)
Thermal conductivity: 80.4 W/(m·K)
Electrical resistivity: 96.1 nΩ·m (at 20 °C)
Curie point: 1043 K
Magnetic ordering: ferromagnetic
Young's modulus: 211 GPa
Shear modulus : 82 GPa
Bulk modulus: 170 GPa
Poisson ratio: 0.29
Mohs hardness: 4
Vickers hardness: 608 MPa
Brinell hardness: 200–1180 MPa
CAS Number: 7439-89-6
The chemical symbol for Iron is Fe and its atomic number is 26.
We find it listed in the periodic table of elements in group 8 and period 4, and block d.
Iron belongs to the family of transition metals such as for example the Silver, the Bohrium, cadmium, ...
This element is stable.
Atomic number (Z) 26
Group, block group 8, d-block
Period: period 4
Element category: transition metal
Standard atomic weight (±) (Ar) 55.845(2)
Electron configuration: [Ar] 3d6 4s2
per shell; 2, 8, 14, 2
Physical properties
Phase: solid
Melting point: 1811 K (1538 °C, 2800 °F)
Boiling point: 3134 K (2862 °C, 5182 °F)
Density near r.t. : 7.874 g/cm3
when liquid, at m.p. 6.98 g/cm3
Heat of fusion: 13.81 kJ/mol
Heat of vaporization: 340 kJ/mol
Molar heat capacity: 25.10 J/(mol·K)
Atomic properties
Oxidation states: −4, −2, −1, +1, +2, +3, +4, +5, +6 (an amphoteric oxide)
Electronegativity: Pauling scale: 1.83
Ionization energies 1st: 762.5 kJ/mol
2nd: 1561.9 kJ/mol
3rd: 2957 kJ/mol
Atomic radius empirical: 126 pm
Covalent radius: Low spin: 132±3 pm
High spin: 152±6 pm
Crystal structure: body-centered cubic a=286.65 pm
Crystal structure: face-centered cubic between 1185–1667 K
Speed of sound thin rod: 5120 m/s (at r.t.) (electrolytic)
Thermal expansion: 11.8 µm/(m·K) (at 25 °C)
Thermal conductivity: 80.4 W/(m·K)
Electrical resistivity: 96.1 nΩ·m (at 20 °C)
Curie point: 1043 K
Magnetic ordering: ferromagnetic
Young's modulus: 211 GPa
Shear modulus : 82 GPa
Bulk modulus: 170 GPa
Poisson ratio: 0.29
Mohs hardness: 4
Vickers hardness: 608 MPa
Brinell hardness: 200–1180 MPa
CAS Number: 7439-89-6
Bohrium chemical element
Bohrium was discovered by Peter Armbruster, Gottfried Münzenberg and researchers from the GSI Helmholtz Centre for Heavy Ion Research in 1981.
The chemical symbol for Bohrium is Bh and its atomic number is 107.
We find it listed in the periodic table of elements in group 7 and 7 period and block.
The Bohrium belongs to the family of transition metals such as for example the Silver, Cadmium, Chromium, ...
This element is Radioactive.
Bohrium was named after Niels Bohr.
Atomic number (Z) 107
Group, block group 7, d-block
Period: period 7
Element category: transition metal
Standard atomic weight (Ar) [270]
Electron configuration: [Rn] 5f14 6d5 7s2 (calculated)
per shell: 2, 8, 18, 32, 32, 13, 2 (predicted)
Physical properties
Phase: solid (predicted)
Density near r.t. : 37.1 g/cm3 (predicted)
Atomic properties
Oxidation states: 7, (5), (4), (3) (parenthesized oxidation states are predictions)
Ionization energies 1st: 742.9 kJ/mol
2nd: 1688.5 kJ/mol
3rd: 2566.5 kJ/mol (all estimated)
Atomic radius empirical: 128 pm (predicted)
Covalent radius: 141 pm (estimated)
Crystal structure: hexagonal close-packed (predicted)
CAS Number: 54037-14-8
The chemical symbol for Bohrium is Bh and its atomic number is 107.
We find it listed in the periodic table of elements in group 7 and 7 period and block.
The Bohrium belongs to the family of transition metals such as for example the Silver, Cadmium, Chromium, ...
This element is Radioactive.
Bohrium was named after Niels Bohr.
Atomic number (Z) 107
Group, block group 7, d-block
Period: period 7
Element category: transition metal
Standard atomic weight (Ar) [270]
Electron configuration: [Rn] 5f14 6d5 7s2 (calculated)
per shell: 2, 8, 18, 32, 32, 13, 2 (predicted)
Physical properties
Phase: solid (predicted)
Density near r.t. : 37.1 g/cm3 (predicted)
Atomic properties
Oxidation states: 7, (5), (4), (3) (parenthesized oxidation states are predictions)
Ionization energies 1st: 742.9 kJ/mol
2nd: 1688.5 kJ/mol
3rd: 2566.5 kJ/mol (all estimated)
Atomic radius empirical: 128 pm (predicted)
Covalent radius: 141 pm (estimated)
Crystal structure: hexagonal close-packed (predicted)
CAS Number: 54037-14-8
Tuesday, June 21, 2016
Rhenium chemical element
Rhenium was discovered by Masataka Ogawa in 1908.
The chemical symbol for Rhenium is Re and its atomic number is 75.
We find it listed in the periodic table of elements in group 7 and 6 period and block.
Rhenium belongs to the family of transition metals such as for example the Silver, the Bohrium, cadmium, ...
This element is stable.
Rhenium was named after the german river Rhenus.
Atomic number (Z) 75
Group, block group 7, d-block
Period: period 6
Element category: transition metal
Standard atomic weight (±) (Ar) 186.207(1)
Electron configuration: [Xe] 4f14 5d5 6s2
per shell: 2, 8, 18, 32, 13, 2
Physical properties
Phase: solid
Melting point: 3459 K (3186 °C, 5767 °F)
Boiling point: 5869 K (5596 °C, 10,105 °F)
Density near r.t.: 21.02 g/cm3
when liquid, at m.p. 18.9 g/cm3
Heat of fusion: 60.43 kJ/mol
Heat of vaporization: 704 kJ/mol
Molar heat capacity: 25.48 J/(mol·K)
Atomic properties
Oxidation states: 7, 6, 5, 4, 3, 2, 1, 0, −1, −3 (a mildly acidic oxide)
Electronegativity: Pauling scale: 1.9
Ionization energies 1st: 760 kJ/mol
2nd: 1260 kJ/mol
3rd: 2510 kJ/mol
Atomic radius empirical: 137 pm
Covalent radius: 151±7 pm
Crystal structure: hexagonal close-packed
Speed of sound thin rod: 4700 m/s (at 20 °C)
Thermal expansion: 6.2 µm/(m·K)
Thermal conductivity: 48.0 W/(m·K)
Electrical resistivity: 193 nΩ·m (at 20 °C)
Magnetic ordering paramagnetic
Young's modulus: 463 GPa
Shear modulus : 178 GPa
Bulk modulus: 370 GPa
Poisson ratio: 0.30
Mohs hardness: 7.0
Vickers hardness: 1350–7850 MPa
Brinell hardness: 1320–2500 MPa
CAS Number: 7440-15-5
The chemical symbol for Rhenium is Re and its atomic number is 75.
We find it listed in the periodic table of elements in group 7 and 6 period and block.
Rhenium belongs to the family of transition metals such as for example the Silver, the Bohrium, cadmium, ...
This element is stable.
Rhenium was named after the german river Rhenus.
Atomic number (Z) 75
Group, block group 7, d-block
Period: period 6
Element category: transition metal
Standard atomic weight (±) (Ar) 186.207(1)
Electron configuration: [Xe] 4f14 5d5 6s2
per shell: 2, 8, 18, 32, 13, 2
Physical properties
Phase: solid
Melting point: 3459 K (3186 °C, 5767 °F)
Boiling point: 5869 K (5596 °C, 10,105 °F)
Density near r.t.: 21.02 g/cm3
when liquid, at m.p. 18.9 g/cm3
Heat of fusion: 60.43 kJ/mol
Heat of vaporization: 704 kJ/mol
Molar heat capacity: 25.48 J/(mol·K)
Atomic properties
Oxidation states: 7, 6, 5, 4, 3, 2, 1, 0, −1, −3 (a mildly acidic oxide)
Electronegativity: Pauling scale: 1.9
Ionization energies 1st: 760 kJ/mol
2nd: 1260 kJ/mol
3rd: 2510 kJ/mol
Atomic radius empirical: 137 pm
Covalent radius: 151±7 pm
Crystal structure: hexagonal close-packed
Speed of sound thin rod: 4700 m/s (at 20 °C)
Thermal expansion: 6.2 µm/(m·K)
Thermal conductivity: 48.0 W/(m·K)
Electrical resistivity: 193 nΩ·m (at 20 °C)
Magnetic ordering paramagnetic
Young's modulus: 463 GPa
Shear modulus : 178 GPa
Bulk modulus: 370 GPa
Poisson ratio: 0.30
Mohs hardness: 7.0
Vickers hardness: 1350–7850 MPa
Brinell hardness: 1320–2500 MPa
CAS Number: 7440-15-5
Technetium chemical element
Technetium was discovered by Emilio Segrè and Carlo Perrier in 1937.
The chemical symbol for Technetium is Tc and its atomic number is 43.
We find it listed in the periodic table of elements in group 7 and period 5 and block.
Technetium belongs to the family of transition metals such as for example the Silver, the Bohrium, cadmium, ...
This element is Radioactive.
Atomic number (Z) 43
Group, block group 7, d-block
Period: period 5
Element category: transition metal
Standard atomic weight (Ar) [98]
Electron configuration: [Kr] 4d5 5s2
per shell: 2, 8, 18, 13, 2
Physical properties
Phase: solid
Melting point: 2430 K (2157 °C, 3915 °F)
Boiling point: 4538 K (4265 °C, 7709 °F)
Density near r.t. : 11 g/cm3
Heat of fusion: 33.29 kJ/mol
Heat of vaporization: 585.2 kJ/mol
Molar heat capacity: 24.27 J/(mol·K)
Atomic properties
Oxidation states: 7, 6, 5, 4, 3, 2, 1, −1, −3 (a strongly acidic oxide)
Electronegativity: Pauling scale: 1.9
Ionization energies 1st: 702 kJ/mol
2nd: 1470 kJ/mol
3rd: 2850 kJ/mol
Atomic radius empirical: 136 pm
Covalent radius: 147±7 pm
Crystal structure: hexagonal close-packed
Speed of sound thin rod: 16,200 m/s (at 20 °C)
Thermal expansion: 7.1 µm/(m·K)[2] (at r.t.)
Thermal conductivity: 50.6 W/(m·K)
Electrical resistivity: 200 nΩ·m (at 20 °C)
Magnetic ordering Paramagnetic
CAS Number: 7440-26-8
The chemical symbol for Technetium is Tc and its atomic number is 43.
We find it listed in the periodic table of elements in group 7 and period 5 and block.
Technetium belongs to the family of transition metals such as for example the Silver, the Bohrium, cadmium, ...
This element is Radioactive.
Atomic number (Z) 43
Group, block group 7, d-block
Period: period 5
Element category: transition metal
Standard atomic weight (Ar) [98]
Electron configuration: [Kr] 4d5 5s2
per shell: 2, 8, 18, 13, 2
Physical properties
Phase: solid
Melting point: 2430 K (2157 °C, 3915 °F)
Boiling point: 4538 K (4265 °C, 7709 °F)
Density near r.t. : 11 g/cm3
Heat of fusion: 33.29 kJ/mol
Heat of vaporization: 585.2 kJ/mol
Molar heat capacity: 24.27 J/(mol·K)
Atomic properties
Oxidation states: 7, 6, 5, 4, 3, 2, 1, −1, −3 (a strongly acidic oxide)
Electronegativity: Pauling scale: 1.9
Ionization energies 1st: 702 kJ/mol
2nd: 1470 kJ/mol
3rd: 2850 kJ/mol
Atomic radius empirical: 136 pm
Covalent radius: 147±7 pm
Crystal structure: hexagonal close-packed
Speed of sound thin rod: 16,200 m/s (at 20 °C)
Thermal expansion: 7.1 µm/(m·K)[2] (at r.t.)
Thermal conductivity: 50.6 W/(m·K)
Electrical resistivity: 200 nΩ·m (at 20 °C)
Magnetic ordering Paramagnetic
CAS Number: 7440-26-8
Manganese chemical element
Manganese was discovered in 1774 by Johan Gottlieb Gahn.
The chemical element Symbol for Manganese is Mn and its atomic number is 25.
We find it listed in the periodic table of elements in group 7 and period 4, and block d.
Manganese belongs to the family of transition metals such as for example the Silver, the Bohrium, cadmium, ...
This element is stable.
Manganese came from the greek word Magnes.
Atomic number (Z) 25
Group, block group 7, d-block
Period: period 4
Element category: transition metal
Standard atomic weight (±) (Ar) 54.938044(3)
Electron configuration: [Ar] 3d5 4s2
per shell: 2, 8, 13, 2
Physical properties
Phase: solid
Melting point: 1519 K (1246 °C, 2275 °F)
Boiling point: 2334 K (2061 °C, 3742 °F)
Density near r.t. : 7.21 g/cm3
when liquid, at m.p. 5.95 g/cm3
Heat of fusion: 12.91 kJ/mol
Heat of vaporization: 221 kJ/mol
Molar heat capacity: 26.32 J/(mol·K)
Atomic properties
Oxidation states: 7, 6, 5, 4, 3, 2, 1, −1, −2, −3 acidic, basic or amphoteric; depending on the oxidation state
Electronegativity: Pauling scale: 1.55
Ionization energies 1st: 717.3 kJ/mol
2nd: 1509.0 kJ/mol
3rd: 3248 kJ/mol
Atomic radius empirical: 127 pm
Covalent radius: Low spin: 139±5 pm
High spin: 161±8 pm
Crystal structure: body-centered cubic
Speed of sound thin rod: 5150 m/s (at 20 °C)
Thermal expansion: 21.7 µm/(m·K) (at 25 °C)
Thermal conductivity: 7.81 W/(m·K)
Electrical resistivity: 1.44 µΩ·m (at 20 °C)
Magnetic ordering paramagnetic
Young's modulus: 198 GPa
Bulk modulus: 120 GPa
Mohs hardness: 6.0
Brinell hardness: 196 MPa
CAS Number: 7439-96-5
The chemical element Symbol for Manganese is Mn and its atomic number is 25.
We find it listed in the periodic table of elements in group 7 and period 4, and block d.
Manganese belongs to the family of transition metals such as for example the Silver, the Bohrium, cadmium, ...
This element is stable.
Manganese came from the greek word Magnes.
Atomic number (Z) 25
Group, block group 7, d-block
Period: period 4
Element category: transition metal
Standard atomic weight (±) (Ar) 54.938044(3)
Electron configuration: [Ar] 3d5 4s2
per shell: 2, 8, 13, 2
Physical properties
Phase: solid
Melting point: 1519 K (1246 °C, 2275 °F)
Boiling point: 2334 K (2061 °C, 3742 °F)
Density near r.t. : 7.21 g/cm3
when liquid, at m.p. 5.95 g/cm3
Heat of fusion: 12.91 kJ/mol
Heat of vaporization: 221 kJ/mol
Molar heat capacity: 26.32 J/(mol·K)
Atomic properties
Oxidation states: 7, 6, 5, 4, 3, 2, 1, −1, −2, −3 acidic, basic or amphoteric; depending on the oxidation state
Electronegativity: Pauling scale: 1.55
Ionization energies 1st: 717.3 kJ/mol
2nd: 1509.0 kJ/mol
3rd: 3248 kJ/mol
Atomic radius empirical: 127 pm
Covalent radius: Low spin: 139±5 pm
High spin: 161±8 pm
Crystal structure: body-centered cubic
Speed of sound thin rod: 5150 m/s (at 20 °C)
Thermal expansion: 21.7 µm/(m·K) (at 25 °C)
Thermal conductivity: 7.81 W/(m·K)
Electrical resistivity: 1.44 µΩ·m (at 20 °C)
Magnetic ordering paramagnetic
Young's modulus: 198 GPa
Bulk modulus: 120 GPa
Mohs hardness: 6.0
Brinell hardness: 196 MPa
CAS Number: 7439-96-5
Seaborgium chemical element
Seaborgium was discovered by the Nuclear Institute of Dubna and by American researchers from the University of California in 1974.
the chemical element symbol for Seaborgium is Sg and its atomic number is 106.
We find it listed in the periodic table in Group 6 and period 7 and block.
The Seaborgium belongs to the family of transition metals such as for example the Silver, the Bohrium, cadmium, ...
This element is Radioactive.
Seaborgium was named after Glenn Theodore Seaborg.
Atomic number (Z) 106
Group, block group 6, d-block
Period: period 7
Element category: transition metal
Standard atomic weight (Ar) [269]
Electron configuration: [Rn] 5f14 6d4 7s2 (predicted)
per shell: 2, 8, 18, 32, 32, 12, 2 (predicted)
Physical properties
Phase: solid (predicted)
Density near r.t. : 35.0 g/cm3 (predicted)
Atomic properties
Oxidation states: 6, (5), (4), (3), 0 (parenthesized oxidation states are predictions)
Ionization energies 1st: 757.4 kJ/mol
2nd: 1732.9 kJ/mol
3rd: 2483.5 kJ/mol (all estimated)
Atomic radius empirical: 132 pm (predicted)
Covalent radius: 143 pm (estimated)
Crystal structure: body-centered cubic
CAS Number 54038-81-2
the chemical element symbol for Seaborgium is Sg and its atomic number is 106.
We find it listed in the periodic table in Group 6 and period 7 and block.
The Seaborgium belongs to the family of transition metals such as for example the Silver, the Bohrium, cadmium, ...
This element is Radioactive.
Seaborgium was named after Glenn Theodore Seaborg.
Atomic number (Z) 106
Group, block group 6, d-block
Period: period 7
Element category: transition metal
Standard atomic weight (Ar) [269]
Electron configuration: [Rn] 5f14 6d4 7s2 (predicted)
per shell: 2, 8, 18, 32, 32, 12, 2 (predicted)
Physical properties
Phase: solid (predicted)
Density near r.t. : 35.0 g/cm3 (predicted)
Atomic properties
Oxidation states: 6, (5), (4), (3), 0 (parenthesized oxidation states are predictions)
Ionization energies 1st: 757.4 kJ/mol
2nd: 1732.9 kJ/mol
3rd: 2483.5 kJ/mol (all estimated)
Atomic radius empirical: 132 pm (predicted)
Covalent radius: 143 pm (estimated)
Crystal structure: body-centered cubic
CAS Number 54038-81-2
tungsten chemical element
Tungsten was disvovered by the brothers Fausto and Juan Jose de Elhuyar in 1783.
The chemical symbol for tungsten is W and its atomic number is 74.
We find it listed in the periodic table in Group 6 and 6 period and block.
Tungsten belongs to the family of transition metals such as for example the Silver, the Bohrium, cadmium, ...
This element is stable.
the name tungsten came from the word tung sten which means heavy rock.
Atomic number (Z) 74
Group, block group 6, d-block
Period: period 6
Element category: transition metal
Standard atomic weight (±) (Ar) 183.84(1)
Electron configuration: [Xe] 4f14 5d4 6s2
per shell: 2, 8, 18, 32, 12, 2
Physical properties
Phase: solid
Melting point: 3695 K (3422 °C, 6192 °F)
Boiling point: 6203 K (5930 °C, 10,706 °F)
Density near r.t.: 19.25 g/cm3
when liquid, at m.p. 17.6 g/cm3
Critical point: 13,892 K, MPa
Heat of fusion: 35.3 kJ/mol
Heat of vaporization: 774 kJ/mol
Molar heat capacity : 24.27 J/(mol·K)
Atomic properties
Oxidation states: 6, 5, 4, 3, 2, 1, 0, −1, −2, −4 (a mildly acidic oxide)
Electronegativity: Pauling scale: 2.36
Ionization energies 1st: 770 kJ/mol
2nd: 1700 kJ/mol
Atomic radius empirical: 139 pm
Covalent radius: 162±7 pm
Crystal structure: body-centered cubic
Speed of sound thin rod 4620 m/s (at r.t.) (annealed)
Thermal expansion: 4.5 µm/(m·K) (at 25 °C)
Thermal conductivity: 173 W/(m·K)
Electrical resistivity: 52.8 nΩ·m (at 20 °C)
Magnetic ordering: paramagnetic
Young's modulus: 411 GPa
Shear modulus : 161 GPa
Bulk modulus: 310 GPa
Poisson ratio: 0.28
Mohs hardness: 7.5
Vickers hardness: 3430–4600 MPa
Brinell hardness: 2000–4000 MPa
CAS Number: 7440-33-7
The chemical symbol for tungsten is W and its atomic number is 74.
We find it listed in the periodic table in Group 6 and 6 period and block.
Tungsten belongs to the family of transition metals such as for example the Silver, the Bohrium, cadmium, ...
This element is stable.
the name tungsten came from the word tung sten which means heavy rock.
Atomic number (Z) 74
Group, block group 6, d-block
Period: period 6
Element category: transition metal
Standard atomic weight (±) (Ar) 183.84(1)
Electron configuration: [Xe] 4f14 5d4 6s2
per shell: 2, 8, 18, 32, 12, 2
Physical properties
Phase: solid
Melting point: 3695 K (3422 °C, 6192 °F)
Boiling point: 6203 K (5930 °C, 10,706 °F)
Density near r.t.: 19.25 g/cm3
when liquid, at m.p. 17.6 g/cm3
Critical point: 13,892 K, MPa
Heat of fusion: 35.3 kJ/mol
Heat of vaporization: 774 kJ/mol
Molar heat capacity : 24.27 J/(mol·K)
Atomic properties
Oxidation states: 6, 5, 4, 3, 2, 1, 0, −1, −2, −4 (a mildly acidic oxide)
Electronegativity: Pauling scale: 2.36
Ionization energies 1st: 770 kJ/mol
2nd: 1700 kJ/mol
Atomic radius empirical: 139 pm
Covalent radius: 162±7 pm
Crystal structure: body-centered cubic
Speed of sound thin rod 4620 m/s (at r.t.) (annealed)
Thermal expansion: 4.5 µm/(m·K) (at 25 °C)
Thermal conductivity: 173 W/(m·K)
Electrical resistivity: 52.8 nΩ·m (at 20 °C)
Magnetic ordering: paramagnetic
Young's modulus: 411 GPa
Shear modulus : 161 GPa
Bulk modulus: 310 GPa
Poisson ratio: 0.28
Mohs hardness: 7.5
Vickers hardness: 3430–4600 MPa
Brinell hardness: 2000–4000 MPa
CAS Number: 7440-33-7
Sunday, June 19, 2016
Molybdenum chemical element
Molybdenum was discovered by Carl Wilhelm Scheele in 1778.
The chemical symbol for Molybdenum is Mo and its atomic number is 42.
We find it listed in the periodic table in Group 6 and period 5 and block.
Molybdenum belongs to the family of transition metals such as for example the Silver, the Bohrium, cadmium, ...
This element is stable.
Molybdenum came from the word molubdaina.
Atomic number (Z) 42
Group, block group 6, d-block
Period: period 5
Element category: transition metal
Standard atomic weight (±) (Ar) 95.95(1)[1]
Electron configuration: [Kr] 4d5 5s1
per shell: 2, 8, 18, 13, 1
Physical properties
Phase: solid
Melting point: 2896 K (2623 °C, 4753 °F)
Boiling point: 4912 K (4639 °C, 8382 °F)
Density near r.t. : 10.28 g/cm3
when liquid, at m.p. 9.33 g/cm3
Heat of fusion: 37.48 kJ/mol
Heat of vaporization: 598 kJ/mol
Molar heat capacity: 24.06 J/(mol·K)
Atomic properties
Oxidation states: 6, 5, 4, 3, 2, 1,−1, −2, −4 (a strongly acidic oxide)
Electronegativity: Pauling scale: 2.16
Ionization energies 1st: 684.3 kJ/mol
2nd: 1560 kJ/mol
3rd: 2618 kJ/mol
Atomic radius empirical: 139 pm
Covalent radius: 154±5 pm
Crystal structure: body-centered cubic
Speed of sound thin rod: 5400 m/s (at r.t.)
Thermal expansion: 4.8 µm/(m·K) (at 25 °C)
Thermal conductivity: 138 W/(m·K)
Thermal diffusivity: 54.3 mm2/s (at 300 K)[3]
Electrical resistivity: 53.4 nΩ·m (at 20 °C)
Magnetic ordering: paramagnetic
Young's modulus: 329 GPa
Shear modulus: 126 GPa
Bulk modulus: 230 GPa
Poisson ratio: 0.31
Mohs hardness: 5.5
Vickers hardness: 1400–2740 MPa
Brinell hardness: 1370–2500 MPa
CAS Number: 7439-98-7
The chemical symbol for Molybdenum is Mo and its atomic number is 42.
We find it listed in the periodic table in Group 6 and period 5 and block.
Molybdenum belongs to the family of transition metals such as for example the Silver, the Bohrium, cadmium, ...
This element is stable.
Molybdenum came from the word molubdaina.

Atomic number (Z) 42
Group, block group 6, d-block
Period: period 5
Element category: transition metal
Standard atomic weight (±) (Ar) 95.95(1)[1]
Electron configuration: [Kr] 4d5 5s1
per shell: 2, 8, 18, 13, 1
Physical properties
Phase: solid
Melting point: 2896 K (2623 °C, 4753 °F)
Boiling point: 4912 K (4639 °C, 8382 °F)
Density near r.t. : 10.28 g/cm3
when liquid, at m.p. 9.33 g/cm3
Heat of fusion: 37.48 kJ/mol
Heat of vaporization: 598 kJ/mol
Molar heat capacity: 24.06 J/(mol·K)
Atomic properties
Oxidation states: 6, 5, 4, 3, 2, 1,−1, −2, −4 (a strongly acidic oxide)
Electronegativity: Pauling scale: 2.16
Ionization energies 1st: 684.3 kJ/mol
2nd: 1560 kJ/mol
3rd: 2618 kJ/mol
Atomic radius empirical: 139 pm
Covalent radius: 154±5 pm
Crystal structure: body-centered cubic
Speed of sound thin rod: 5400 m/s (at r.t.)
Thermal expansion: 4.8 µm/(m·K) (at 25 °C)
Thermal conductivity: 138 W/(m·K)
Thermal diffusivity: 54.3 mm2/s (at 300 K)[3]
Electrical resistivity: 53.4 nΩ·m (at 20 °C)
Magnetic ordering: paramagnetic
Young's modulus: 329 GPa
Shear modulus: 126 GPa
Bulk modulus: 230 GPa
Poisson ratio: 0.31
Mohs hardness: 5.5
Vickers hardness: 1400–2740 MPa
Brinell hardness: 1370–2500 MPa
CAS Number: 7439-98-7
Chromium chemical element
Chromium was discovered by Louis-Nicolas Vauquelin in 1797.
The chemical symbol for Chromium is Cr and its atomic number is 24.
We find it listed in the periodic table in Group 6 and period 4, and block d.
Chromium belongs to the family of transition metals such as for example the Silver, the Bohrium, cadmium, ...
This element is stable.
Chrome came from the greek work Khroma.
Atomic number (Z) 24
Group, block group 6, d-block
Period: period 4
Element category: transition metal
Standard atomic weight (±) (Ar) 51.9961(6)[1]
Electron configuration: [Ar] 3d5 4s1
per shell: 2, 8, 13, 1
Physical properties
Phase: solid
Melting point: 2180 K (1907 °C, 3465 °F)
Boiling point: 2944 K (2671 °C, 4840 °F)
Density near r.t. : 7.19 g/cm3
when liquid, at m.p. 6.3 g/cm3
Heat of fusion: 21.0 kJ/mol
Heat of vaporization: 347 kJ/mol
Molar heat capacity: 23.35 J/(mol·K)
Atomic properties
Oxidation states: 6, 5, 4, 3, 2, 1, −1, −2, −4 (depending on the oxidation state, an acidic, basic, or amphoteric oxide)
Electronegativity: Pauling scale: 1.66
Ionization energies 1st: 652.9 kJ/mol
2nd: 1590.6 kJ/mol
3rd: 2987 kJ/mol
Atomic radius empirical: 128 pm
Covalent radius: 139±5 pm
Crystal structure: body-centered cubic.
Speed of sound thin rod: 5940 m/s (at 20 °C)
Thermal expansion: 4.9 µm/(m·K) (at 25 °C)
Thermal conductivity: 93.9 W/(m·K)
Electrical resistivity: 125 nΩ·m (at 20 °C)
Magnetic ordering antiferromagnetic (rather: SDW)
Young's modulus: 279 GPa
Shear modulus: 115 GPa
Bulk modulus: 160 GPa
Poisson ratio: 0.21
Vickers hardness: 1060 MPa
Brinell hardness: 687–6500 MPa
CAS Number: 7440-47-3
The chemical symbol for Chromium is Cr and its atomic number is 24.
We find it listed in the periodic table in Group 6 and period 4, and block d.
Chromium belongs to the family of transition metals such as for example the Silver, the Bohrium, cadmium, ...
This element is stable.
Chrome came from the greek work Khroma.
Atomic number (Z) 24
Group, block group 6, d-block
Period: period 4
Element category: transition metal
Standard atomic weight (±) (Ar) 51.9961(6)[1]
Electron configuration: [Ar] 3d5 4s1
per shell: 2, 8, 13, 1
Physical properties
Phase: solid
Melting point: 2180 K (1907 °C, 3465 °F)
Boiling point: 2944 K (2671 °C, 4840 °F)
Density near r.t. : 7.19 g/cm3
when liquid, at m.p. 6.3 g/cm3
Heat of fusion: 21.0 kJ/mol
Heat of vaporization: 347 kJ/mol
Molar heat capacity: 23.35 J/(mol·K)
Atomic properties
Oxidation states: 6, 5, 4, 3, 2, 1, −1, −2, −4 (depending on the oxidation state, an acidic, basic, or amphoteric oxide)
Electronegativity: Pauling scale: 1.66
Ionization energies 1st: 652.9 kJ/mol
2nd: 1590.6 kJ/mol
3rd: 2987 kJ/mol
Atomic radius empirical: 128 pm
Covalent radius: 139±5 pm
Crystal structure: body-centered cubic.
Speed of sound thin rod: 5940 m/s (at 20 °C)
Thermal expansion: 4.9 µm/(m·K) (at 25 °C)
Thermal conductivity: 93.9 W/(m·K)
Electrical resistivity: 125 nΩ·m (at 20 °C)
Magnetic ordering antiferromagnetic (rather: SDW)
Young's modulus: 279 GPa
Shear modulus: 115 GPa
Bulk modulus: 160 GPa
Poisson ratio: 0.21
Vickers hardness: 1060 MPa
Brinell hardness: 687–6500 MPa
CAS Number: 7440-47-3
Dubnium chemical element
Dubnium was discovered by researchers at the Nuclear Institute of Dubna and by American researchers from the University of California, Berkeley.
The chemical symbol for Dubnium is Db and its atomic number is 105.
We find it listed in the periodic table of elements in group 5 and 7 period and block.
The Dubnium belongs to the family of transition metals such as for example the Silver, the Bohrium, cadmium, ...This element is Radioactive.
this element was named Dubnium after the city Dubna.
Atomic number (Z) 105
Group, block group 5, d-block
Period: period 7
Element category :transition metal
Standard atomic weight (Ar) [268]
Electron configuration: [Rn] 5f14 6d3 7s2 (predicted)[1]
per shell: 2, 8, 18, 32, 32, 11, 2 (predicted)
Physical properties
Phase: solid (predicted)
Density near r.t. : 29.3 g/cm3 (predicted)
Atomic properties
Oxidation states: 5, (4), (3) (parenthesized oxidation states are predictions)
Ionization energies: 1st: 664.8 kJ/mol
2nd: 1546.7 kJ/mol
3rd: 2378.4 kJ/mol (all estimated)
Atomic radius empirical: 139 pm (estimated)
Covalent radius: 149 pm (estimated)
Crystal structure :body-centered cubic (bcc) (predicted).
CAS Number: 53850-35-4
The chemical symbol for Dubnium is Db and its atomic number is 105.
We find it listed in the periodic table of elements in group 5 and 7 period and block.
The Dubnium belongs to the family of transition metals such as for example the Silver, the Bohrium, cadmium, ...This element is Radioactive.
this element was named Dubnium after the city Dubna.
Atomic number (Z) 105
Group, block group 5, d-block
Period: period 7
Element category :transition metal
Standard atomic weight (Ar) [268]
Electron configuration: [Rn] 5f14 6d3 7s2 (predicted)[1]
per shell: 2, 8, 18, 32, 32, 11, 2 (predicted)
Physical properties
Phase: solid (predicted)
Density near r.t. : 29.3 g/cm3 (predicted)
Atomic properties
Oxidation states: 5, (4), (3) (parenthesized oxidation states are predictions)
Ionization energies: 1st: 664.8 kJ/mol
2nd: 1546.7 kJ/mol
3rd: 2378.4 kJ/mol (all estimated)
Atomic radius empirical: 139 pm (estimated)
Covalent radius: 149 pm (estimated)
Crystal structure :body-centered cubic (bcc) (predicted).
CAS Number: 53850-35-4
Tantalum chemical element
Tantalum was discovered by Anders Gustaf Ekeberg in 1802.
The chemical symbol for Tantalum is Ta and its atomic number is 73.
We find it listed in the periodic table of elements in group 5 and 6 period and block d.
Tantalum belongs to the family of transition metals such as for example the Silver, the Bohrium, cadmium, ...
This element is stable.
Tantalum Atomic number (Z) 73
Group, block group 5, d-block
Period: period 6
Element categorytransition metal
Standard atomic weight (±) (Ar) 180.94788(2).
Electron configuration: [Xe] 4f14 5d3 6s2
per shell 2, 8, 18, 32, 11, 2
Tantalum Physical properties
Phase: solid
Melting point: 3290 K (3017 °C, 5463 °F)
Boiling point: 5731 K (5458 °C, 9856 °F)
Density near r.t. : 16.69 g/cm3
when liquid, at m.p. 15 g/cm3
Heat of fusion 36.57 kJ/mol
Heat of vaporization: 753 kJ/mol
Molar heat capacity: 25.36 J/(mol·K)
Tantalum Atomic properties
Oxidation states: 5, 4, 3, 2, 1, −1, −3 (a mildly acidic oxide)
Electronegativity: Pauling scale: 1.5
Ionization energies: 1st: 761 kJ/mol
2nd: 1500 kJ/mol
Atomic radius empirical: 146 pm
Covalent radius: 170±8 pm
Tantalum Crystal structure: body-centered cubic
Crystal structure: tetragonal Tetragonal crystal structure for tantalum
Speed of sound thin rod 3400 m/s (at 20 °C)
Thermal expansion 6.3 µm/(m·K) (at 25 °C)
Thermal conductivity: 57.5 W/(m·K)
Electrical resistivity: 131 nΩ·m (at 20 °C)
Magnetic ordering paramagnetic.
Young's modulus: 186 GPa
Shear modulus 69 GPa
Bulk modulus :200 GPa
Poisson ratio: 0.34
Mohs hardness: 6.5
Vickers hardness: 870–1200 MPa
Brinell hardness: 440–3430 MPa
CAS Number :7440-25-7
The chemical symbol for Tantalum is Ta and its atomic number is 73.
We find it listed in the periodic table of elements in group 5 and 6 period and block d.
Tantalum belongs to the family of transition metals such as for example the Silver, the Bohrium, cadmium, ...
This element is stable.
Tantalum Atomic number (Z) 73
Group, block group 5, d-block
Period: period 6
Element categorytransition metal
Standard atomic weight (±) (Ar) 180.94788(2).
Electron configuration: [Xe] 4f14 5d3 6s2
per shell 2, 8, 18, 32, 11, 2
Tantalum Physical properties
Phase: solid
Melting point: 3290 K (3017 °C, 5463 °F)
Boiling point: 5731 K (5458 °C, 9856 °F)
Density near r.t. : 16.69 g/cm3
when liquid, at m.p. 15 g/cm3
Heat of fusion 36.57 kJ/mol
Heat of vaporization: 753 kJ/mol
Molar heat capacity: 25.36 J/(mol·K)
Tantalum Atomic properties
Oxidation states: 5, 4, 3, 2, 1, −1, −3 (a mildly acidic oxide)
Electronegativity: Pauling scale: 1.5
Ionization energies: 1st: 761 kJ/mol
2nd: 1500 kJ/mol
Atomic radius empirical: 146 pm
Covalent radius: 170±8 pm
Tantalum Crystal structure: body-centered cubic
Crystal structure: tetragonal Tetragonal crystal structure for tantalum
Speed of sound thin rod 3400 m/s (at 20 °C)
Thermal expansion 6.3 µm/(m·K) (at 25 °C)
Thermal conductivity: 57.5 W/(m·K)
Electrical resistivity: 131 nΩ·m (at 20 °C)
Magnetic ordering paramagnetic.
Young's modulus: 186 GPa
Shear modulus 69 GPa
Bulk modulus :200 GPa
Poisson ratio: 0.34
Mohs hardness: 6.5
Vickers hardness: 870–1200 MPa
Brinell hardness: 440–3430 MPa
CAS Number :7440-25-7

















