| 释义 |
berkelium Chem.|bəˈkiːlɪəm, ˈbɜːklɪəm|
[mod.L., f. Berkeley, California, where the element was first made + -ium.]
A metallic radioactive transuranic element not occurring in nature but made artificially; symbol Bk; atomic number 97.
1950S. G. Thompson et al. in Physical Rev. LXXVII. 838/2 It is suggested that element 97 be given the name berkelium (symbol Bk), after the city of Berkeley. 1951J. R. Partington Gen. & Inorg. Chem. (ed. 2) xxvi. 760 Berkelium..and californium..are formed by bombarding americium and curium, respectively, with high-energy helium ions. |