Samarium

Symbol | Sm
Latin name | Samarium
Atomic number | 62
Period | 6
Element category | Inner transition elements
Relative atomic mass | 150.36
Group | III.B
Electronegativity | 1.2
Oxidation numbers | 2, 3
Electron configuration | 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2 5p6 4f6 5d0 6s2
Density [g/cm3] | 7.54
State | Solid
Melting point [°C] | 1077
Boiling point [°C] | 1791
Atomic radius [pm] | 238
Covalent radius [pm] | 162
Thermal conductivity [W m-1K-1] | 13.3
Heat capacity [J K-1g-1] | 0.197
Discovery | 1879
Vickers hardness [MPa] | 412
Brinell hardness [MPa] | 441
Young's modulus [GPa] | 50
Electrical conductivity [S m-1] | 1.1 · 106
Shear modulus [GPa] | 20
1.st ionization energy [eV] | 5.6437
2.nd ionization energy [eV] | 11.069
3.rd ionization energy [eV] | 23.423
Stable isotopes | 7
Unstable isotopes | 13