berke·li·um /ˈbɝkliəm/
放射性元素,符號Bk,原子序為98
berke·li·um /ˈbɝklɪəm/ 名詞
培
berkelium
n : a radioactive transuranic element; discovered by bombarding
americium with helium [syn: Bk, atomic number 97]
berkelium
Symbol: Bk
Atomic number: 97
Atomic weight: (247)
Radioactive metallic transuranic element. Belongs to actinoid series.
Eight known isotopes, the most common Bk-247, has a half-life of
1.4*10^3 years. First produced by Glenn T. Seaborg and associates in 1949
by bombarding americium-241 with alpha particles.