单词	fluorine
释义	fluorine /ˈflʊəriːn / /ˈflɔːriːn/ noun [mass noun] The chemical element of atomic number 9, a poisonous pale yellow gas of the halogen series. It is the most reactive of all the elements, causing very severe burns on contact with skin. (Symbol: F) The elements hydrogen, nitrogen, oxygen, fluorine, chlorine, bromine and iodine consist of diatomic molecules.... The halogens are a group of chemical elements that includes fluorine, chlorine, bromine, iodine, and astatine. Potassium also reacts readily with all acids and with many nonmetals, such as sulfur, fluorine, chlorine, phosphorus, and nitrogen. Origin Early 19th century: from fluor (see fluorspar) + -ine4.
随便看	pelletisation pelletise pelletiser pelletization pelletize pelletizer pellet mill pellet molding pellet moulding pellet powder pellet stove pellety Pellian Pelli, Cesar pellicle pellicular pellicule pellitorine pellitory pellitory of the wall pell-mell pellock pellotine Pell's fishing owl pellucent

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