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De - Pt| English Dictionary: americium | by the DICT Development Group |
| 2 results for americium | |
| From WordNet (r) 3.0 (2006) [wn]: | |
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| From The Elements (22Oct97) [elements]: | |
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americium Symbol: Am Atomic number: 95 Atomic weight: (243) Radioactive metallic transuranic element, belongs to the actinoids. Ten known isotopes. Am-243 is the most stable isotope, with a half-life of 7.95*10^3 years. Discovered by Glenn T. Seaborg and associates in 1945, it was obtained by bombarding {uranium}-238 with alpha particles. | |
