Meaning of ATOMIC NUMBER 9

WordNet Dictionary
	Definition:		[n]  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
	Synonyms:		F, fluorine
	See Also:		chemical element, cryolite, element, fluor, fluorapatite, fluorite, fluorspar, gas, Greenland spar, halogen