Elements of periodic system. 2013.
Fluorine — Fluorine, la. fluorum, meaning to flow ), is the chemical element with the symbol F and atomic number 9. Atomic fluorine is univalent and is the most chemically reactive and electronegative of all the elements. In its elementally isolated (pure)… … Wikipedia
fluorine — [ flyɔrin ] n. f. • 1833; de fluor ♦ Chim. Fluorure de calcium naturel (cf. Spath fluor). On dit aussi FLUORITE . ● fluorite ou fluorine nom féminin Fluorure naturel de calcium, de formule CaF2, qui cristallise le plus souvent en cubes de teinte… … Encyclopédie Universelle
Fluorine — Flu or*ine (fl[=u] [o^]r*[i^]n or fl[=u] [o^]r*[=e]n; 104), n. [NL. fluorina: cf. G. fluorin, F. fluorine. So called from its occurrence in the mineral fluorite.] (Chem.) A non metallic, gaseous element of atomic number 9, strongly acid or… … The Collaborative International Dictionary of English
fluorine — 1813, non metallic element, coined by English chemist Sir Humphry Davy (1778 1829) from fluorspar ( calcium fluoride, modern fluorite), the late 18c. name of the mineral where it was first found; see FLUOR (Cf. fluor) + chemical suffix INE (Cf.… … Etymology dictionary
fluorine — ► NOUN ▪ a poisonous, extremely reactive, pale yellow gaseous chemical element. ORIGIN from fluor (see FLUORSPAR(Cf. ↑F)) … English terms dictionary
fluorine — [flôr′ēn΄, floor′ēn] n. [ FLUOR + INE3] a corrosive, toxic, greenish yellow gaseous chemical element, one of the halogens and the most reactive nonmetallic element, forming fluorides with almost all known elements: symbol, F; at. no., 9: see the… … English World dictionary
fluorine — /floor een, in, flawr , flohr /, n. Chem. the most reactive nonmetallic element, a pale yellow, corrosive, toxic gas that occurs combined, esp. in fluorite, cryolite, phosphate rock, and other minerals. Symbol: F; at. wt.: 18.9984; at. no.: 9.… … Universalium
Fluorine — Fluorite Catégorie III : halogénures[1] Fluorite sur quartz Le Burg France Muséum de Toulouse … Wikipédia en Français
Fluorine-18 — Infobox isotope background = #eee text color = isotope name = Fluorine 18 isotope filename = alternate names = Fluorine 18 mass number = 18 symbol = F num neutrons = 9 num protons = 9 abundance = Radioisotope halflife = 109.771(20) min decay… … Wikipedia
fluorine-18 — noun An artificial radioactive isotope of fluorine, , having nine protons and nine neutrons, that is an important industrial source of positrons See Also: fluorine 19 … Wiktionary
