Astatine

Discovery Information
Who: D.R.Corson, K.R.MacKenzie, E.Segre
When: 1940
Where: United States

Name Origin
Greek: astatos (unstable).
"Astatine" in different languages.

Sources
Does not occur in nature. Produced by bombarding bismuth with alpha particles. The longest-lived isotope, 210At, has a half-life of only 8.3 hours. There are about 20 isotopes known, all of which are radioactive. Astatine is a halogen and possibly accumulates in the thyroid like iodine.




Uses
None.

History
first synthesized in 1940 by Dale R. Corson, K. R. MacKenzie, and Emilio Segre at the University of California, Berkeley by barraging bismuth with alpha particles.
An earlier name for the element was alabamine

Category:

Science & Technology

Tags:

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