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118 Elements
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85 At

Astatine

Halogen
Atomic Mass
210 u
Density
6.2 g/cm³
Melting Point
302 °C
Boiling Point
337 °C
State
Solid
Discovery
1940

Discovery

Discovered by Dale R. Corson, Kenneth Ross MacKenzie, and Emilio Segrè in 1940.

Common Uses

  • Limited use in medical treatments such as cancer therapy (targeted alpha-particle therapy).
  • Research use due to its extreme rarity and radioactivity.

Interesting Facts

  • Astatine is one of the rarest naturally occurring elements on Earth.
  • Its radioactivity makes it hazardous and difficult to study.
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