Article
Article
Iodine
Article By:
Adams, Chris J. Unilever Research, Merseyside, United Kingdom.
Last reviewed:September 2018
DOI:https://doi.org/10.1036/1097-8542.351300
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A chemical element, I, atomic number 53, atomic weight 126.90. Iodine, a Group 17 element, is the heaviest member in the naturally occurring halogen family. Under normal conditions iodine is a black, lustrous, and volatile solid. It is named after the color of its vapor from the Greek word iodes, meaning violet (see illustration). See also: Halogen elements; Periodic table
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