Meaning | A highly unstable radioactive element (the heaviest of the halogen series); a decay product of uranium and thorium. |
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Synonyms | At, atomic number 85 |
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Broader | 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 |
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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 |
Spanish | astato, ástato, número atómico 85 |
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Catalan | àstat |
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