promethium
From Trekipedia
promethium
Symbol | Pm |
Atomic Weight | 145 |
Atomic Number | 61 |
Discovered | 1945 |
Advertising |
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]
Notes and References
- ↑ Palestine, Eileen and Geoffrey Mandel (Editors). Star Fleet Medical Reference Manual. Star Trek. Book. Originally published by Star Fleet Productions, Inc.. Ballantine Books. 1977.