A gaseous chemical element with symbol F and atomic number 9; a member of the halide family, it is the most electronegative element and the most chemically energetic of the nonmetallic elements; highly toxic and corrosive; used in rocket fuels and as a chemical intermediate.
(Source: MGH)
a nonmetallic univalent element; usually a yellow irritating toxic flammable gas; a powerful oxidizing agent; recovered from fluorite or cryolite or fluorapatite
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
