Shell Structure
Crystal Structure
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| Element | Information |
| Atomic Number: | 61 |
| Symbol: | Pm |
| Name: | Promethium |
| Name Origin: | Named for the Greek god, Prometheus |
| Type: | Rare Earth |
| Atomic Mass: | 145 |
| Melting Point: | ? |
| Boiling Point: | ? |
| Neutrons: | 84 |
| Density: | 6.475 |
| Crystal Structure: | Hexagonal |
| Discovered: | 1947 |
| Discoverers: | Discovered by J.A. Marinshy, L.E. Glendenin & C.D. Coryell (USA). |
| Other Names: | |
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