fluorine vs. fluoride

the most reactive nonmetallic element, a pale-yellow, corrosive, toxic gas that occurs combined, especially in fluorite, cryolite, phosphate rock, and other minerals. : F; : 18.9984; : 9.

a salt of hydrofluoric acid consisting of two elements, one of which is fluorine, as sodium fluoride, NaF.

a compound containing fluorine, as methyl fluoride, CH 3 F.