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Element: iodine

Name : iodine

Symbol : I

Atomicnumber : 53

Relativeatomicmass : 126.90447 (3)

Standardstate : solid at 298 K

Appearance : violet-dark grey, lustrous

Classification : Non-metallic

Groupinperiodictable : 17

Groupname : Halogen

Periodinperiodictable : 5

Blockinperiodictable : p

Shellstructure : 2.8.18.18.7

CASRegistry : 7553-56-2

Description : Iodine is a bluish-black, lustrous solid. It volatilises at ambient temperatures into a pretty blue-violet gas with an irritating odour.