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vanadium    音标拼音: [vən'ediəm]
n. 钒

钒

vanadium
n 1: a soft silvery white toxic metallic element used in steel
alloys; it occurs in several complex minerals including
carnotite and vanadinite [synonym: {vanadium}, {V}, {atomic
number 23}]

Vanadium \Va*na"di*um\, n. [NL., fr. Icel. Vanad[imac]s, a
surname of the Scandinavian goddess Freya.] (Chem.)
A rare element of the nitrogen-phosphorus group, found
combined, in vanadates, in certain minerals, and reduced as
an infusible, grayish-white metallic powder. It is
intermediate between the metals and the non-metals, having
both basic and acid properties. Symbol V (or Vd, rarely).
Atomic weight 50.94 (C12=12.000).
[1913 Webster PJC]

vanadium
Symbol: V
Atomic number: 23
Atomic weight: 50.9415
Soft and ductile, bright white metal. Good resistance to corrosion by
alkalis, sulphuric and hydrochloric acid. It oxidizes readily about
933K. There are two naturally occurring isotopes of vanadium, and 5
radioisotopes, V-49 having the longest half-life at 337 days. Vanadium
has nuclear applications, the foil is used in cladding titanium to
steel,
and vanadium-gallium tape is used to produce a superconductive magnet.
Originally discovered by Andres Manuel del Rio of Mexico City in 1801.
His discovery went unheeded, however, and in 1820, Nils Gabriel Sefstron
of Sweden rediscovered it. Metallic vanadium was isolated by Henry
Enfield
Roscoe in 1867. The name vanadium comes from {Vanadis}, a goddess of
Scandinavian mythology. Silvery-white metallic transition element.
Vanadium is essential to {ascidian}s. Rats and chickens are also known
to require it. Metal powder is a fire hazard, and vanadium compounds
should be considered highly toxic. May cause lung cancer if inhaled.


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  • Vanadium - Wikipedia
    Vanadium is a chemical element; it has symbol V and atomic number 23 It is a hard, silvery-grey, malleable transition metal The elemental metal is rarely found in nature, but once isolated artificially, the formation of an oxide layer (passivation) somewhat stabilizes the free metal against further oxidation
  • Vanadium: Overview, Uses, Side Effects, Precautions . . . - WebMD
    Learn more about Vanadium uses, effectiveness, possible side effects, interactions, dosage, user ratings and products that contain Vanadium
  • Vanadium | Facts, Industrial, Medical, Automotive Applications . . .
    vanadium (V), chemical element, silvery white soft metal of Group 5 (Vb) of the periodic table It is alloyed with steel and iron for high-speed tool steel, high-strength low-alloy steel, and wear-resistant cast iron
  • Vanadium: Benefits, Importance, Dosage And Prevention
    Vanadium is an essential trace mineral for daily use It is found in mushrooms, shellfish, black pepper, parsley, grains, and drinking water Vanadium can both inhibit and enhance the action of insulin Vanadium is used to prevent vanadium deficiency
  • Vanadium - Element information, properties and uses | Periodic Table
    Vanadium metal was first prepared in the 1860s by English chemist Henry Enfield Roscoe The place of vanadium as a trace element necessary for life processes has been just as tortuously argued and hotly debated through most of the last century - doubtless many organisms and other mammals require it but do humans?
  • Vanadium Facts, Symbol, Discovery, Properties, Uses
    Vanadium (pronunciation: veh-NAY-dee-em) is a medium-hard, silvery element belonging to the family of transition metals represented by the chemical symbol V [1, 2]
  • What Is Vanadium? | How Is It Used? | Australian Vanadium Ltd
    Vanadium is a transition metal with a natural resistance to corrosion and stability against alkalis, acids and salt water Vanadium is found in over 60 different minerals including vanadinite, carnotite, roscoelite and patronite
  • Vanadium | Public Health Statement | ATSDR - Centers for Disease . . .
    Vanadium is a natural element in the earth It is a white to gray metal, often found as crystals It has no particular odor Vanadium occurs naturally in fuel oils and coal In the environment it is usually combined with other elements such as oxygen, sodium, sulfur, or chloride
  • Vanadium: Health Benefits, Side Effects, Uses, Dose Precautions - RxList
    Vanadium is LIKELY SAFE in adults, if less than 1 8 mg per day is taken At higher doses, such as those used to treat diabetes, vanadium frequently causes unwanted side effects including abdominal discomfort, diarrhea, nausea, and gas





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