| Property | Value |
|---|---|
| Atomic number | 62 |
| Atomic weight | 150.362 amu |
| Element family | N/A |
| Electronic configuration | 1s2 |
| Stable and very long lived isotopes | 144Sm: 3.1%, 150Sm: 7.4%, 152Sm: 26.7%, 154Sm: 22.7% |
| Previous element | Promethium |
| Next element | Europium |
| Density | 7.52 g/cm3 (STP) |
| Melting | 1072 °C |
| Boiling | 1778 °C |
| Covalent radius | 1.72 Å |
| Ionic radius | 0.964 Å |
| Metallic radius | 1.804 Å |
| First ionization potential | 5.643 eV |
| Electron affinity | 0.162 eV |
| Electronegativity | 1.17 |
| Discovery year | 1879 |
Samarium is an element number 62 from n/a family. Its symbol is Sm. Samarium atomic weight is 150.362 amu. Sm stable and long lived isotopes are 144Sm: 3.1%, 150Sm: 7.4%, 152Sm: 26.7%, 154Sm: 22.7%. Samarium electronic configuration is 1s22s22p63s23p63d104s24p64d105s25p66s24f6. Sample compounds that contain Samarium are SmO, Sm2O3.
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