53I

Iodine

Reactive Nonmetal

Iodine (I) is element 53, a reactive nonmetal, in period 5 and group 17 of the periodic table. Its standard atomic weight is 126.904, it melts at 113.7 °C and boils at 184.3 °C. Discovered by Bernard Courtois, 1811.

Atomic Number53

SymbolI

NameIodine

Atomic Weight126.904 u

CategoryReactive Nonmetal

Period5

Group17

Melting Point113.7 °C

Boiling Point184.3 °C

Density4.93 g/cm³

Electron Config[Kr] 4d10 5s2 5p5

Discovered ByBernard Courtois, 1811

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