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Iodine

13:14

Iodine - THE MOST COLOURFUL ELEMENT ON EARTH!

5:57

Iodine - Periodic Table of Videos

1:42

The Chemical Elements: The Discovery of Iodine

7:38

Iodine Element (FULL version)

3:05

All about iodine in 3 minutes

Iodine is a chemical element with symbol I and atomic number 53. The heaviest of the stable halogens, it exists as a lustrous, purple-black metallic solid at standard conditions that sublimes readily to form a violet gas. The elemental form was discovered by the French chemist Bernard Courtois in 1811. It was named two years later by Joseph-Louis Gay-Lussac from this property, after the Greek ἰώδης "violet-coloured".
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  • History 

  • Properties 

  • Chemistry and compounds 

  • Occurrence and production 

  • Applications 

  • Biological role 

  • Precautions