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