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Dictionary

  Definition of atomic number 9
  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
Similar Words: fluorine, F

 

Substance Meronyms: fluorite, fluorspar, fluor, fluorapatite, cryolite, Greenland spar

 

 
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