berkelium

柯林斯词典

berkelium /bɜːˈkiːlɪəm, ˈbɜːklɪəm/

• 1. N a metallic transuranic element produced by bombardment of americium. Symbol: Bk; atomic no: 97; half-life of most stable isotope, 247Bk: 1400 years; valency: 3 or 4; relative density: 14 (est) 锫

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