- atomic number 17 as a noun:
- 1
atomic number 17
noun
1 atomic number 17
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).
Dutch: chloor
Polish: chlor, Cl
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