53

I

Iodine
126.90447 (3)
 Historical Information

Iodine was discovered by Barnard Courtois in 1811. He isolated iodine from treating seaweed ash with sulphuric acid (H2SO4) while recovering sodium and potassium compounds.
Basic Information Shells
  • Name:Bromine
  • Symbol: Br
  • Atomic number: 53
  • Atomic weight:126.90447 (3)
  • Standard state: liquid at 298 K
  • Group in periodic table: 17
  • Group name:Halogen
  • Period in periodic table: 5
  • Block in periodic table: p-block
  • Classification: Non-metallic
 Iodine
Uses Trivia
  • nutrient
  • silver iodide is used in photography
  • eep blue colour in a starch solution is a sign of the free element

It is assimilated by seaweeds from which it may be recovered, and is found in Chilean saltpetre, caliche, old salt brines, and salt wells.