53 I 126.90

Iodine

Category: Halogen | State: Solid

Atomic Properties

Atomic Number 53
Atomic Mass 126.90
Electronic Configuration [Kr] 4d¹⁰ 5s² 5p⁵

Periodic Table Placement

Group 17
Period 5
Block p-block

Physical Properties & Discovery

Melting Point 113.7°C
Boiling Point 184.3°C
Density 4.93 g/cm³
Discovered By Bernard Courtois (1811)

Frequently Asked Questions about Iodine