Periodic Table of the Elements: Arsenic

Name: Arsenic
Symbol: As
Atomic Number: 33
Atomic Mass: 74.9216
Atomic Volume: 12.98 cc/mol
Discovered By: Isolated by Albertus Magnus in 1250
Discovery Date: 1250
Origin of Name: Arsenic - (Latin) arsenicum, (Greek) arsenikon (yellow orpiment (As 2 O 3 ) identified with arsenikos (male) in the belief that metals were different sexes) (Arabic) az-zernikh (the orpiment from Persian zerni-zar (gold))
Toxicity: Elementary arsenic is not toxic in pure form. Compounds are highly toxic.
Summary: Found to a small extent as the element, mostly as arsenides of metals. Most compounds containing arsenic are poisonous. Gallium arsenide is an important semiconductor material.


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HHe
LiBeBCNOFNe
NaMgAlSiPSClAr
KCaScTiVCrMnFeCoNiCuZnGaGeAsSeBrKr
RbSrYZrNbMoTcRuRhPdAgCdInSnSbTeIXe
CsBaLaCePrNdPmSmEuGdTbDyHoErTmYbLuHfTaWReOsIrPtAuHgTlPbBiPoAtRn
FrRaAcThPaUNpPuAmCmBkCfEsFmMdNoLr

© Copyright 1998 David August