01 About Iodine
Sublimes directly from solid to purple vapour at room temperature. Essential for thyroid hormones. Iodine-131 is used in nuclear medicine and was released at Chernobyl.
02 Physical Properties
State at room temperature๐ชจ Solid
Melting point113.7 ยฐC
Boiling point184.3 ยฐC
Density4.933 g/cmยณ
Atomic mass126.904 u
Electron configuration2,8,18,18,7
Period / GroupPeriod 5, Group 17
BlockP-block
03 Discovery
Iodine was discovered in 1811 by Courtois.