Promethium
Lanthanide| Atomic number | 61 |
|---|---|
| Category | Lanthanide |
| Atomic mass | 145 |
| Electron configuration | [Xe]4f⁵ 6s² |
| Oxidation states | +3 |
| Electronegativity | 1.13 |
| Melting point | 1,042 °C |
| Boiling point | 3,000 °C |
| Density | 7.26 g/cm³ |
| Crystal structure | Hexagonal |
| Period | 6 |
| Block | f |
| Discovered | 1,945 |
| Crustal abundance | 0 ppm |