Difference between revisions of "actinium"
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| − | Actinium, element 89, was discovered in [[France]] on [[ | + | Actinium, element 89, was discovered in [[France]] on [[Earth]] in [[19th Century#1899|1899]]. The most stable isotope discovered had a mass of 227.<ref name="MRM"/> |
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Latest revision as of 14:42, 26 February 2023
actinium
UFP Historical Society
| Symbol | Ac |
| Atomic Weight | 227 |
| Atomic Number | 89 |
| Discovered | 1899 |
| Advertising |
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.
