17

Cl

Chlorine
35.453 (2)
 Historical Information

Chlorine was discovered in 1774 by Carl Wilhelm Scheele. He obtained it through the reaction of the mineral pyrolusite (manganese dioxide, MnO2) with hydrochloric acid (HCl, then known as muriatic acid). Scheele thought the resulting gas contained oxygen. Sir Humphry Davy proposed and confirmed chlorine to be an element in 1810, and he also named the element.
Basic Information Shells
  • Name:Chlorine
  • Symbol: Cl
  • Atomic number: 17
  • Atomic weight:35.453 (2)
  • Standard state: solid at 298 K
  • Group in periodic table: 17
  • Group name:Halogen
  • Period in periodic table: 3
  • Block in periodic table: p-block
  • Classification: Non-metallic
 chlorine
Uses Trivia
  • manufacture of chlorates, chloroform, carbon tetrachloride
  • used for the extraction of bromine
  • PVC pipe used to provide safe drinking water

Chlorine is a greenish yellow gas which combines directly with nearly all elements. Chlorine is a respiratory irritant. The gas irritates the mucous membranes and the liquid burns the skin.