Essential Facts
| Atomic number | 61 |
| Name | Promethium |
| Symbol | Pm |
| Atomic mass | 145 |
| Classification | Lanthanide (rare earth) |
| State at 20°C | Synthetic |
| Melting point | 1080°C |
| Boiling point | 2460°C |
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Promethium (Pm)Essential Facts
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Copyright © 2008-2012 Gary Wallace - All Rights Reserved |
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