actinium

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actinium
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UFP Historical Society
Symbol Ac
Atomic Weight 227
Atomic Number 89
Discovered 1899
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FASA Timeline
(FASA Roleplaying Game)


Actinium, element 89, was discovered in France on Earth in 1899. The most stable isotope discovered had a mass of 227.[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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