astatine

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English[edit]

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Chemical element
At Previous: polonium (Po)
Next: radon (Rn)

Etymology[edit]

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

Pronunciation[edit]

Noun[edit]

astatine (uncountable)

  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.

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