English Edit

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Chemical element
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Etymology Edit

From Ancient Greek ἄστατος (ástatos, unstable) +‎ -ine.

Pronunciation Edit

  • (UK) enPR: asʹtətēn, IPA(key): /ˈastətiːn/
  • (US) enPR: ăs'tətēn, IPA(key): /ˈæstəˌtin/
  • (file)

Noun Edit

astatine (countable and uncountable, plural astatines)

  1. A highly radioactive chemical element (symbol At), one of the halogens, with atomic number 85.
    Synonyms: (proposed name) alabamine, (formerly) anglo-helvetium
    • 2003, Bill Bryson, A Short History of Nearly Everything, BCA, page 221:
      Astatine, for instance, is practically unstudied. It has a name and a place on the periodic table (next to Marie Curie's polonium), but almost nothing else.

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