Chemical Elements History and Information Astatine
About the chemical element Astatine, its symbol, atomic number and weight, who discovered it and when.
The Atomic Elements and Their Uses
(Element) (Symbol) (Atomic number) (Atomic weight)
Astatine At 85 (210)
Discovered by Dale Corson, K. R. MacKenzie, and Emilio Segre of the U.S. in 1940. The total quantity of astatine in the earth's crust probably amounts to less than 1 oz. Therefore, scientists have had to synthesize all the astatine they've needed for experimental purposes.
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