The periodic table/Astatine

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Discovery

Astatine was discovered in the University of California, Berkeley, USA by Dale R. Corson, K. R. MacKenzie, and Emilio Segre in 1940.

Quick Facts

Name: Astatine Atom Symbol: At Atomic Mass: 210 amu Classification: group 7 (halogens)

Protons: 85 Electrons: 85 Neutrons: 125 Colour: unknown, predicted to be black Discovery in: 1940

Density: unknown Crystal Structure: unknown Melting Point: 302 °C (575 K) Boiling Point: 337 °C (610 K) Common Uses: radiation therapy, medical uses

See also

Search for Astatine on Wikipedia.

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