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单词 berkelium
释义

berkelium

noun
/bɜːˈkiːliəm/, /ˈbɜːkliəm/
/ˈbɜːrkliəm/
[uncountable]
(symbol Bk)
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  1. a chemical element. Berkelium is a radioactive metal that is produced artificially from americium and helium.
    Word Origin1949: from Berkeley, a city in western California, USA (where it was first made) + -ium.
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更新时间:2025/3/10 13:50:03