atomic number 9
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 • Syn: fluorine, F • Hypernyms: chemical element, element, gas, halogen • Substance Holonyms: fluorite, fluorspar, fluor, fluorapatite, cryolite, Greenland spar
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