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单词 atomic number 85
释义
atomic number 85
(extremely rare)
n

WORD FAMILY
atomic number 85
n a highly unstable radioactive element (the heaviest of the halogen series); a decay product of uranium and thorium
Syn|Hyper
At, astatine
chemical element, element
any of the more than 100 known substances (of which 92 occur naturally) that cannot be separated into simpler substances and that singly or in combination constitute all matter
halogen
any of five related nonmetallic elements (fluorine or chlorine or bromine or iodine or astatine) that are all monovalent and readily form negative ions
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更新时间:2024/11/10 21:19:22