| Attribute | Value |
|---|---|
| Symbol | Sm |
| Standard state | Solid |
| Atomic mass | 150.4 u |
| Electron configuration | [Xe]6s²4f⁶ |
| Oxidation states |
|
| Electronegativity (pauling scale) | 1.17 |
| Atomic radius (van der waals) | 229 pm |
| Ionization energy | 5.644 eV |
| Melting point | 1347 K |
| Boiling point | 2067 K |
| Density | 7.52 g/cm³ |
| Atomic number | 62 |
| Group name | Lanthanide |
| Discovered | 1879 year |
| Electron affinity | Add |