berkelium
noun/bɜːˈkiːliəm/, /ˈbɜːkliəm/
/ˈbɜːrkliəm/
[uncountable] (symbol Bk)
- 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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berkelium