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fluorine    音标拼音: [fl'ʊr,in] [fl'ɔr,in]
n. 氟[非金属元素]

氟[非金属元素]

fluorine
n 1: 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 [synonym: {fluorine}, {F}, {atomic number 9}]

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 negative, and associated with chlorine, bromine, and
iodine, in the halogen group of which it is the first member.
It always occurs combined, is very active chemically, and
possesses such an avidity for most elements, and silicon
especially, that it can neither be prepared nor kept in glass
vessels, but may be contained in lead vessels. If set free it
immediately attacks a containing glass vessel, so that it was
not isolated until 1886. It is a pungent, corrosive,
colorless gas. Symbol F. Atomic weight 19.00.
[1913 Webster]

Note: Fluorine unites with hydrogen to form hydrofluoric
acid, which is the agent employed in etching glass. It
occurs naturally, principally combined as calcium
fluoride in fluorite, and as a double fluoride of
aluminium and sodium in cryolite.
[1913 Webster]


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  • Fluorine - Wikipedia
    Fluorine is extremely reactive as it reacts with all other elements except for the light noble gases In its elemental form it is highly toxic Among the elements, fluorine ranks 24th in cosmic abundance and 13th in crustal abundance
  • Fluorine | Uses, Properties, Facts | Britannica
    Fluorine, the most reactive chemical element and the lightest member of the halogen elements Its chemical activity can be attributed to its extreme ability to attract electrons (it is the most electronegative element) and to the small size of its atoms
  • Fluorine - Element information, properties and uses | Periodic Table
    Element Fluorine (F), Group 17, Atomic Number 9, p-block, Mass 18 998 Sources, facts, uses, scarcity (SRI), podcasts, alchemical symbols, videos and images
  • Fluorine Element Facts - chemicool. com
    Fluorine is the most reactive and the most electronegative of all the elements Fluorine is a pale yellow, diatomic, highly corrosive, flammable gas, with a pungent odor
  • Fluorine Facts - Atomic Number 9 or F - ThoughtCo
    Fluorine is a very reactive pale yellow gas found in products like water and toothpaste Henri Moissan discovered fluorine in 1886 and won a Nobel Prize for isolating it safely Fluorine is highly toxic and should not be ingested, but it helps reduce cavities in toothpaste
  • Fluorine (F) Element: Occurrence, Important Properties, Uses
    Fluorine (F) is the heaviest of the halogen elements (Group 17; Group VIIa) and the chemical element with the highest reactivity Even the noble gases krypton, xenon, and radon can combine with fluorine to produce compounds
  • Fluorine | F (Element) - PubChem
    Chemical element, Fluorine, information from authoritative sources Look up properties, history, uses, and more
  • Fluorine, Chemical Element - reaction, water, uses, elements, examples . . .
    Fluorine is the lightest member of the halogen family, elements in Group 17 (VIIA) of the periodic table The periodic table is a chart that shows how elements are related to one another
  • Periodic Table of Elements: Los Alamos National Laboratory
    Elemental fluorine and the fluoride ion are highly toxic The free element has a characteristic pungent odor, detectable in concentrations as low as 20 ppb, which is below the safe working level
  • Fluorine (F): Properties Uses - StudiousGuy
    Fluorine is the lightest member of the halogen family in the periodic table with atomic no 9 and symbol F It is the most electronegative element in the periodic table Therefore, it can react with almost every other element present in the periodic table, except argon, neon, and helium





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