| 单词 |
berkelium |
| 释义 |
ber·ke·li·um noun /bɜːˈkiːliəm/, /ˈbɜːkliəm/ /ˈbɜːrkliəm/ [uncountable] (symbol Bk) - a chemical element. Berkelium is a radioactive metal that is produced artificially from americium and helium.锫（放射性元素）
Word Origin1949: from Berkeley, a city in western California, USA (where it was first made) + -ium.
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