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Thesaurus: 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
Related headwords
agentdefinitionbelongingdefinitioncryolitedefinitionelementdefinitionflammabledefinitionfluorapatitedefinitionfluoritedefinitiongasdefinitionhalogensdefinitionirritatingdefinitionnonmetallicdefinitionoxidizingdefinitionpowerfuldefinitionrecovereddefinitiontoxicdefinitionunivalentdefinitionyellowdefinitionatomicfamilyatomic bombfamilyatomic clockfamilyatomic cocktailfamilyatomic energyfamilyAtomic Energy Commissionfamilyatomic explosionfamilyatomic massfamilyatomic mass unitfamilyatomic numberfamilyatomic number 1family