am·er·i·ci·um /ˌæməˈrɪʃiəm, si-/
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am·er·i·ci·um /ˌæməˈrɪs(h)ɪəm/ 名詞
鋂
americium
n : a radioactive transuranic metallic element; discovered by
bombarding uranium with helium atoms [syn: Am, atomic
number 95]
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.