| name | Promethium |
| latin | Promethium |
| french | Prométhium |
| german | Promethium |
| symbol | Pm |
| proton number | 61 |
| atomic weight | [145] |
| Pauling electronegativity | - |
| electronic configuration | [Xe] 4f55d06s2 1s22s22p63s23p63d104s24p64d105s25p64f55d06s2 |
| melting point | 1373 K, 1100°C, 2012°F |
| boiling point | 3273 K, 3000°C, 5432°F |
| group | - |
| period | 6 |
| state (by 20°C) | solid |
| oxidation states | +3 |
| Year of discovery | Discoverers |
| 1945 | Jacob A. Marinsky Lawrence E. Glendenin Charles D. Coryell |