promethium

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promethium
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UFP Historical Society
Symbol Pm
Atomic Weight 145
Atomic Number 61
Discovered 1945
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FASA Timeline
(FASA Roleplaying Game)


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

  1. ↑ Palestine, Eileen and Geoffrey Mandel (Editors). Star Fleet Medical Reference Manual. Star Trek. Book. Originally published by Star Fleet Productions, Inc.. Ballantine Books. 1977.
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