HyperDic: astatine

English > 1 sense of the word astatine:
NOUNsubstanceastatine, At, atomic number 85a highly unstable radioactive element (the heaviest of the halogen series)
English > astatine: 1 sense > noun 1, substance
MeaningA highly unstable radioactive element (the heaviest of the halogen series); a decay product of uranium and thorium.
SynonymsAt, atomic number 85
Broaderchemical element, elementAny 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
halogenAny of five related nonmetallic elements (fluorine or chlorine or bromine or iodine or astatine) that are all monovalent and readily form negative ions
Spanishastato, ástato, número atómico 85
Catalanàstat

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