HyperDic: atomic_number_9

English > 1 sense of the expression atomic number 9:
NOUNsubstanceatomic number 9, fluorine, Fa nonmetallic univalent element belonging to the halogens
English > atomic number 9: 1 sense > noun 1, substance
MeaningA 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.
Synonymsfluorine, F
Broaderchemical element, elementAny of the more than 100 known substances (of which 92 occur naturally) that cannot be separated into simpler substances and that singly or in combination constitute all matter
gasA fluid in the gaseous state having neither independent shape nor volume and being able to expand indefinitely
halogenAny of five related nonmetallic elements (fluorine or chlorine or bromine or iodine or astatine) that are all monovalent and readily form negative ions
Substance ofcryolite, Greenland sparA white mineral consisting of fluorides of aluminum and sodium
fluorapatiteA form of apatite in which fluorine predominates over chlorine
fluorite, fluorspar, fluorA soft mineral (calcium fluoride) that is fluorescent in ultraviolet light
Spanishflúor, número atómico 9
Catalanfluor, número atòmic 9

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