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Samarium (Sm)
Atomic number 62 · Lanthanide
| Atomic number | 62 |
|---|---|
| Atomic mass | 150.36 u |
| Molar mass | 150.36 g/mol |
| Category | Lanthanide |
| Group / period / block | — / 6 / f |
| Electron configuration | [Xe] 4f6 6s2 |
| Electrons per shell | 2, 8, 18, 24, 8, 2 |
| Electronegativity (Pauling) | 1.17 |
| Atomic radius | 185.0 pm |
| Density | 7.52 g/cm³ |
| First ionisation energy | 5.6437 eV |
| Melting point | 1345.15 K (1072.00 °C) |
| Boiling point | 2067.15 K (1794.00 °C) |
| Common oxidation states | +3 |
| Abundance in Earth's crust | 7.05 ppm |
Uses
Magnets, cancer treatment
Discovery
1879, Paul Émile Lecoq de Boisbaudran