Periodic Table of the Elements: Thorium

Name: Thorium
Symbol: Th
Atomic Number: 90
Atomic Mass: 232.038
Atomic Volume: 19.79 cc/mol
Discovered By: Berzelius
Discovery Date: 1828
Origin of Name: Thorium - named for Thor, the Norse god of war
Toxicity: Chemical toxicity of thorium is not high, but the radioactive effect is great (especially highly active, short-lived members of the thorium series).
Summary: Found as ores in Nature, and associated with uranium ores. Thorium is used in gas lantern mantels as it glows white when heated in a gas flame.


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HHe
LiBeBCNOFNe
NaMgAlSiPSClAr
KCaScTiVCrMnFeCoNiCuZnGaGeAsSeBrKr
RbSrYZrNbMoTcRuRhPdAgCdInSnSbTeIXe
CsBaLaCePrNdPmSmEuGdTbDyHoErTmYbLuHfTaWReOsIrPtAuHgTlPbBiPoAtRn
FrRaAcThPaUNpPuAmCmBkCfEsFmMdNoLr

© Copyright 1998 David August