The chemical symbol for Yttrium is Y and its atomic number is 39.
We find it listed in the periodic table of elements in group 3 and 5 period and block.
Yttrium belongs to the family or chemical series of transition metals such as for example the Silver, the Bohrium, cadmium, ...
This element is stable.
Yttrium was named after the city Ytterby.
Atomic number (Z) 39
Group, block group 3, d-block
Period: period 5
Element category: transition metal
Standard atomic weight (±) (Ar): 88.90584(2)[1]
Electron configuration: [Kr] 4d1 5s2
per shell: 2, 8, 18, 9, 2
Physical properties
Phase: solid
Melting point: 1799 K (1526 °C, 2779 °F)
Boiling point: 3203 K (2930 °C, 5306 °F)
Density near r.t.: 4.472 g/cm3
when liquid, at m.p. 4.24 g/cm3
Heat of fusion 11.42 kJ/mol
Heat of vaporization: 363 kJ/mol
Molar heat capacity: 26.53 J/(mol•K)
Atomic properties:
Oxidation states: 3, 2, 1 (a weakly basic oxide)
Electronegativity: Pauling scale: 1.22
Ionization energies 1st: 600 kJ/mol
2nd: 1180 kJ/mol
3rd: 1980 kJ/mol
Atomic radius empirical: 180 pm
Covalent radius: 190±7 pm
Crystal structure: hexagonal close-packed
Speed of sound thin rod: 3300 m/s (at 20 °C)
Thermal expansion α, poly: 10.6 µm/(m•K) (at r.t.)
Thermal conductivity: 17.2 W/(m•K)
Electrical resistivity: α, poly: 596 nΩ•m (at r.t.)
Magnetic ordering: paramagnetic
Young's modulus: 63.5 GPa
Shear modulus : 25.6 GPa
Bulk modulus: 41.2 GPa
Poisson ratio: 0.243
Brinell hardness: 200–589 MPa
CAS Number: 7440-65-5