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 |