| Promethium ✕ | |
|---|---|
| Symbol | Pm |
| Atomic number | 61 |
| Chemical property | Lanthanide |
| Origin o the name | Prometheus of Greek mythology who stole fire from the Gods and gave it to humans |
| Period | 6 |
| Density (g/cm³) | 7.26 |
| Melting point (K) | 1315 |
| Boiling point (K) | 3273 |
| Electro-negativity | 1.13 |
| Abundance in earth's crust (mg/kg) | 0 |