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Iodine

Iodine is a chemical element in the periodic table that has the symbol I and atomic number 53.

Chemically, iodine is the least reactive of the halogens, and the most electropositive halogen after astatine.

Iodine is used in pharmaceuticals, antiseptics, medicine, food supplements, dyes, catalysts and photography.

It is required in trace amounts by most living organisms.It is required as a trace element for most living organisms.

Iodine deficiency gives rise to goiter.

Note:   The above text is excerpted from the Wikipedia article "Iodine", which has been released under the GNU Free Documentation License.
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August 28, 2015

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