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cobalt    音标拼音: [k'ob,ɔlt]
n. 钴,钴类颜料,由钴制的深蓝色

钴,钴类颜料,由钴制的深蓝色

cobalt
n 1: a hard ferromagnetic silver-white bivalent or trivalent
metallic element; a trace element in plant and animal
nutrition [synonym: {cobalt}, {Co}, {atomic number 27}]

Cobalt \Co"balt\ (k[=o]"b[o^]lt; 277, 74), n. [G. kobalt, prob.
fr. kobold, kobel, goblin, MHG. kobolt; perh. akin to G.
koben pigsty, hut, AS. cofa room, cofgodas household gods,
Icel. kofi hut. If so, the ending -old stands for older
-walt, -wald, being the same as -ald in E. herald and the
word would mean ruler or governor in a house, house spirit,
the metal being so called by miners, because it was poisonous
and troublesome. Cf. {Kobold}, {Cove}, {Goblin}.]
1. (Chem.) A tough, lustrous, reddish white metal of the iron
group, not easily fusible, and somewhat magnetic. Atomic
weight 59.1. Symbol Co.
[1913 Webster]

Note: It occurs in nature in combination with arsenic,
sulphur, and oxygen, and is obtained from its ores,
smaltite, cobaltite, asbolite, etc. Its oxide colors
glass or any flux, as borax, a fine blue, and is used
in the manufacture of smalt. It is frequently
associated with nickel, and both are characteristic
ingredients of meteoric iron.
[1913 Webster]

2. A commercial name of a crude arsenic used as fly poison.
[1913 Webster]

{Cobalt bloom}. Same as {Erythrite}.

{Cobalt blue}, a dark blue pigment consisting of some salt of
cobalt, as the phosphate, ignited with alumina; -- called
also {cobalt ultramarine}, and {Thenard's blue}.

{Cobalt crust}, earthy arseniate of cobalt.

{Cobalt glance}. (Min.) See {Cobaltite}.

{Cobalt green}, a pigment consisting essentially of the
oxides of cobalt and zinc; -- called also {Rinman's
green}.

{Cobalt yellow} (Chem.), a yellow crystalline powder,
regarded as a double nitrite of cobalt and potassium.
[1913 Webster]

cobalt
Symbol: Co
Atomic number: 27
Atomic weight: 58.993
Light grey transition element. Some meteorites contain small amounts of
metallic cobalt. Generally alloyed for use. Mammals require small
amounts
of cobalt salts. Cobalt-60, an artificially produced radioactive isotope
of Cobalt is an important radioactive tracer and cancer-treatment agent.
Discovered by G. Brandt in 1737.


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  • cobalt
    cobalt lets you save what you love without ads, tracking, paywalls or other nonsense just paste the link and you're ready to rock!
  • Cobalt - Wikipedia
    Cobalt occurs naturally as only one stable isotope, cobalt-59 Cobalt-60 is a commercially important radioisotope, used as a radioactive tracer and for the production of high-energy gamma rays Cobalt is also used in the petroleum industry as a catalyst when refining crude oil
  • Cobalt | Uses, Properties, Facts | Britannica
    cobalt (Co), chemical element, ferromagnetic metal of Group 9 (VIIIb) of the periodic table, used especially for heat -resistant and magnetic alloys
  • Cobalt - Element information, properties and uses | Periodic Table
    Element Cobalt (Co), Group 9, Atomic Number 27, d-block, Mass 58 933 Sources, facts, uses, scarcity (SRI), podcasts, alchemical symbols, videos and images
  • Cobalt | Co (Element) - PubChem
    Chemical element, Cobalt, information from authoritative sources Look up properties, history, uses, and more
  • About Cobalt - Cobalt Institute
    Cobalt is a critical and essential element used across various sectors of the global economy: electronics, automotive, aerospace, and healthcare
  • Cobalt Definition, Facts, Symbol, Discovery, Property, Uses
    Cobalt (pronunciation: KO-bolt) is a hard, lustrous silvery-blue element belonging to the group of transition metals, and it is represented by the chemical symbol Co [1, 2, 3]
  • Cobalt - HyperPhysics
    Cobalt - HyperPhysics Cobalt
  • Cobalt - New World Encyclopedia
    Cobalt (chemical symbol Co, atomic number 27) is a hard, lustrous, silver-gray metal It is found in various ores and is important as a trace element in the human body
  • Cobalt - ScienceDaily
    Cobalt is a hard, lustrous, silver-gray metal, a chemical element with symbol Co It is found in various ores, and is used in the preparation of magnetic, wear-resistant, and high-strength alloys





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