Name:
Astatine
Symbol:
At
Atomic Number:
85
Atomic Mass:
(210)
Atomic Volume:
??? cc/mol
Discovered By:
First synthesized in 1940 by Corson, MacKenzie, and Segre by bombarding bismuth with alpha particles
Discovery Date:
1940
Origin of Name:
Astatine - (Greek) astatos (unstable)
Toxicity:
???
Summary:
Found in nature only as the breakdown products of uranium and thorium. The heaviest known halogen. Less than one ounce of astatine is estimated to exist in the earth's crust.
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