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Noun: atomic number 17
  1. A common nonmetallic element belonging to the halogens; best known as a heavy yellow irritating toxic gas; used to purify water and as a bleaching agent and disinfectant; occurs naturally only as a salt (as in sea water)
    - chlorine, Cl

Type of: chemical element, element, gas, halogen

Part of: common salt, sodium chloride

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