ATOMIC NUMBER 9

 Dictionary entry overview: What does atomic number 9 mean? 

• ATOMIC NUMBER 9 (noun)
  The noun ATOMIC NUMBER 9 has 1 sense:

1. a nonmetallic univalent element belonging to the halogens; usually a yellow irritating toxic flammable gas; a powerful oxidizing agent; recovered from fluorite or cryolite or fluorapatite

  Familiarity information: ATOMIC NUMBER 9 used as a noun is very rare.

 Dictionary entry details 

• ATOMIC NUMBER 9 (noun)

Sense 1

Meaning:

A nonmetallic univalent element belonging to the halogens; usually a yellow irritating toxic flammable gas; a powerful oxidizing agent; recovered from fluorite or cryolite or fluorapatite

Classified under:

Nouns denoting substances

Synonyms:

atomic number 9; F; fluorine

Hypernyms ("atomic number 9" 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)

Holonyms ("atomic number 9" is a substance of...):

cryolite; Greenland spar (a white mineral consisting of fluorides of aluminum and sodium; a source of fluorine)

fluorapatite (a form of apatite in which fluorine predominates over chlorine)

fluor; fluorite; fluorspar (a soft mineral (calcium fluoride) that is fluorescent in ultraviolet light; chief source of fluorine)

 Context examples 

An element with atomic symbol F, atomic number 9, and atomic weight 19.0.

(Fluorine, NCI Thesaurus)