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Chlorine

Halogen
Atomic Mass
35.45 u
Density
1.56 g/cm³ (liquid at melting point)
Melting Point
-101.5 °C
Boiling Point
-34.04 °C
State
Gas
Discovery
1774

Discovery

Discovered by Carl Wilhelm Scheele in 1774.

Common Uses

  • Used in water treatment and disinfection
  • Integral in the production of PVC (polyvinyl chloride)
  • Applied as a bleaching agent in the paper industry

Interesting Facts

  • Chlorine is highly reactive and forms compounds with many elements.
  • It was used as a chemical weapon during World War I.
  • Chlorine gas is toxic and must be handled with care.
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