ATOMIC NUMBER 17

 Dictionary entry overview: What does atomic number 17 mean? 

• ATOMIC NUMBER 17 (noun)
  The noun ATOMIC NUMBER 17 has 1 sense:

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)

  Familiarity information: ATOMIC NUMBER 17 used as a noun is very rare.

 Dictionary entry details 

• ATOMIC NUMBER 17 (noun)

Sense 1

Meaning:

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)

Classified under:

Nouns denoting substances

Synonyms:

atomic number 17; chlorine; Cl

Hypernyms ("atomic number 17" is a kind of...):

chemical element; element (any of the more than 100 known substances (of which 92 occur naturally) that cannot be separated into simpler substances and that singly or in combination constitute all matter)

gas (a fluid in the gaseous state having neither independent shape nor volume and being able to expand indefinitely)

halogen (any of five related nonmetallic elements (fluorine or chlorine or bromine or iodine or astatine) that are all monovalent and readily form negative ions)

Hyponyms (each of the following is a kind of "atomic number 17"):

radiochlorine (a radioactive isotope of chlorine)

Holonyms ("atomic number 17" is a substance of...):

common salt; sodium chloride (a white crystalline solid consisting mainly of sodium chloride (NaCl))

 Context examples 

An element with atomic symbol Cl, atomic number 17, and atomic weight 35.05.

(Chlorine, NCI Thesaurus)