Periodic Table of the Elements: Iodine

Name: Iodine
Symbol: I
Atomic Number: 53
Atomic Mass: 126.9004
Atomic Volume: 25.72 cc/mol
Discovered By: Courtois
Discovery Date: 1811
Origin of Name: Iodine - (Greek) iodes (violet)
Toxicity: Toxic, produces dermatitis; vapor (see chlorine ) attacks mucous membranes producing pulmonary edema.
Summary: Not found free in nature, but as various iodides. Iodine volatilizes when moderately heated to a purple gas. Iodine is necessary for proper thyroid function. Lack of it causes goiter. A small amount of potassium iodide (KI) is added to table salt to deliver dietary iodine. Tincture of iodine used as an antiseptic is a solution of iodine and KI in alcohol.


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HHe
LiBeBCNOFNe
NaMgAlSiPSClAr
KCaScTiVCrMnFeCoNiCuZnGaGeAsSeBrKr
RbSrYZrNbMoTcRuRhPdAgCdInSnSbTeIXe
CsBaLaCePrNdPmSmEuGdTbDyHoErTmYbLuHfTaWReOsIrPtAuHgTlPbBiPoAtRn
FrRaAcThPaUNpPuAmCmBkCfEsFmMdNoLr

© Copyright 1998 David August