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 |