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fluorine vs. fluoride

[ floor-een, -in, flawr-, flohr- ]
  1. the most reactive nonmetallic element, a pale-yellow, corrosive, toxic gas that occurs combined, especially in fluorite, cryolite, phosphate rock, and other minerals. Symbol: F; atomic weight: 18.9984; atomic number: 9.
[ floor-ahyd, flawr-, flohr- ]
  1. a salt of hydrofluoric acid consisting of two elements, one of which is fluorine, as sodium fluoride, NaF.
  2. a compound containing fluorine, as methyl fluoride, CH3F.

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