promethium
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UFP Historical Society
promethium
UFP Historical Society
| Symbol | Pm |
| Atomic Weight | 145 |
| Atomic Number | 61 |
| Discovered | 1945 |
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Promethium, element 61, was discovered in the United States of America on Earth in 1945. The most stable isotope discovered had a mass of 145.[1]
Wikipedia
Notes and References
- ↑ Palestine, Eileen and Geoffrey Mandel (Authors). Star Fleet Medical Reference Manual. Star Trek. Book. Originally published by Star Fleet Productions, Inc. Ballantine Books. 1977.