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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 a chemical element; it has symbol F and atomic number 9 It is the lightest halogen and exists at standard conditions as pale yellow diatomic gas Fluorine is extremely reactive as it reacts with all other elements except for the light noble gases Fluorine in its elemental form is highly toxic Among the elements, fluorine ranks 24th in cosmic abundance and 13th in crustal
  • 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
  • Halogen | Elements, Examples, Properties, Uses, Facts | Britannica
    Halogen, any of the six nonmetallic elements that constitute Group 17 (Group VIIa) of the periodic table The halogen elements are fluorine (F), chlorine (Cl), bromine (Br), iodine (I), astatine (At), and tennessine (Ts) Learn more about the properties of halogens in this article
  • Facts About Fluorine - Live Science
    The most reactive element on the Periodic Table, fluorine has a violent history in the quest for its discovery Despite the difficult and sometimes explosive properties of fluorine, it is a vital
  • 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
  • What exactly is fluoride, and why is it added to our tap water?
    With more councils voting to remove fluoride from drinking water recently, it's worth revisiting exactly why was added in the first place So what is fluoride, how does it work — and if you don
  • Fluorine - GeeksforGeeks
    Fluorine is a common element that belongs to the 17th Group of the periodic table Fluorine is one of the six halogen gas element Fluorine is defined as symbol F Naturally fluorine is pale yellow type gas that contains pungent odor In this article, we will learn each and every details related to fluorine such that what is fluorine, data of fluorine, properties of fluorine, uses and many
  • Fluorine Facts, Symbol, Discovery, Properties, Uses
    Is fluorine (element 19) gas a metal metalloid nonmetal, discovery date, properties (atomic number, color, melting point, electron configuration), important applications
  • Fluorine: From Mystery Mineral to Modern Marvel
    Fluorine has evolved from a mysterious mineral to the cornerstone of science and everyday life Highly reactive and notoriously elusive, its discovery was marked by dangerous experiments, tragic setbacks, and […]
  • Fluorine: Element Properties and Uses - samaterials. com
    Fluorine is a highly reactive and electronegative chemical element known for its unique properties and various applications in both industrial and scientific fields





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