astatine

English

Chemical element
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Next: radon (Rn)

Etymology

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

Pronunciation

  • (UK) enPR: asʹtətēn, IPA(key): /ˈastətiːn/
  • Audio (US)(file)

Noun

astatine (countable and uncountable, plural astatines)

  1. A highly radioactive chemical element (symbol At), one of the halogens, with atomic number 85.
    • 2003, Bill Bryson, A Short History of Nearly Everything, BCA, p. 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.

Synonyms

  • alabamine (proposed name)
  • anglo-helvetium (formerly)

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