protactinium

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protactiniuim
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UFP Historical Society
Symbol Pa
Atomic Weight 231
Atomic Number 91
Discovered 1917
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FASA Timeline
(FASA Roleplaying Game)


Protactinium, element 91, was discovered in Germany and England on Earth in 1917. The most stable isotope discovered had a mass of 231.[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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