fluorine

fluorine
Symbol: F
Atomic number: 9
Atomic weight: 18.9984
A poisonous pale yellow gaseous element belonging to group 17 of the periodic table (The halogens). It is the most chemically reactive and electronegative element. It is highly dangerous, causing severe chemical burns on contact with flesh. Fluorine was identified by Scheele in 1771 and first isolated by Moissan in 1886.

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

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