单词 | berkelium |
释义 | berkelium/bəːˈkiːlɪəm / /ˈbəːklɪəm /noun [mass noun] The chemical element of atomic number 97, a radioactive metal of the actinide series. Berkelium does not occur naturally and was first made by bombarding americium with helium ions. (Symbol: Bk) Following up on berkelium, dubnium and californium, researchers at the University of Berkely in California, stumbled upon am element with atomic number 117 about a year ago....
Origin1949: from Berkeley (where it was first made) + -ium. Rhymes |
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