I

Electrons:2 -8-18-18-7
Oxidation States: +1+5+7-1
Atomic Weight: 126.90447
Phase: Liquid
M.P.: 386.85 K
(113.7 °C, 236.66 °F)
B.P.: 457.4 K
(184.3 °C, 363.7 °F)

Occurrence: 2.9x10-9%
Iodine (from the Greek word Iodes, meaning "violet"). It is required as a trace element for most living organisms.Chemically, iodine is the least reactive of the halogens, and the most electropositive halogen.

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