Periodic Table of the Elements: Astatine

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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HHe
LiBeBCNOFNe
NaMgAlSiPSClAr
KCaScTiVCrMnFeCoNiCuZnGaGeAsSeBrKr
RbSrYZrNbMoTcRuRhPdAgCdInSnSbTeIXe
CsBaLaCePrNdPmSmEuGdTbDyHoErTmYbLuHfTaWReOsIrPtAuHgTlPbBiPoAtRn
FrRaAcThPaUNpPuAmCmBkCfEsFmMdNoLr

© Copyright 1998 David August