How to say atomic number 17 ?

Atomic number 17

[əˈtɑmɪk ˈnʌmbər 17]

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What is the definition of 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)
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