actinium
From Trekipedia
actinium
Symbol | Ac |
Atomic Weight | 227 |
Atomic Number | 89 |
Discovered | 1899 |
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Actinium, element 89, was discovered in France on Earth in 1899. The most stable isotope discovered had a mass of 227.[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.