A metallic radioactive transuranic element, atomic number 97, produced artificially. Symbol Bk.
| 单词 | θ68903 |
| 释义 | the world > matter > chemistry > elements and compounds > metals > specific elements > berkelium > [noun] (2) berkelium1950 A metallic radioactive transuranic element, atomic number 97, produced artificially. Symbol Bk. Bk1950 The element berkelium. |
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