• Florine – manufacture of P.T.F.E (Poly tetra fluoroethene) synthetic fiber.
• Reduce tooth decay when added in small amounts/quantities in tooth paste.

• NB –large small quantities of fluorine /fluoride ions in water cause browning of teeth/flourosis.

  • Hydrogen fluoride is used to engrave words /pictures in glass
  • Bromine - Silver bromide is used to make light sensitive photographic paper/films.

  Iodide – Iodine dissolved in alcohol is used as medicine to kill bacteria in skin cuts. It is called tincture of iodine.

State four specific uses of halogens.