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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 - Wikipedia
    As with nickel, cobalt is found in the Earth's crust only in a chemically combined form, save for small deposits found in alloys of natural meteoric iron The free element, produced by reductive smelting, is a hard, lustrous, somewhat brittle, gray metal
  • 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 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] It is chemically active and can form many compounds [4]
  • Cobalt: Offensive Security Services
    Cobalt enables a scalable response and risk remediation without the need to expand your workforce With our comprehensive approach, you can address current challenges and adapt for future demands
  • What Is Cobalt Mining and Why Is It Controversial?
    Cobalt mining is the extraction of cobalt, a silvery-blue metal, from underground ore deposits Most of the world’s cobalt comes from copper-cobalt ores in the Democratic Republic of the Congo (DRC), which accounts for 74% of global cobalt mine production The metal is essential to rechargeable batteries, particularly the lithium-ion batteries that power electric vehicles and smartphones
  • Cobalt Facts and Physical Properties - ThoughtCo
    Get periodic table facts on the chemical and physical properties of the element cobalt
  • Cobalt Statistics and Information | U. S. Geological Survey
    Cobalt (Co) is a metal used in numerous diverse commercial, industrial, and military applications, many of which are strategic and critical On a global basis, the leading use of cobalt is in rechargeable battery electrodes
  • Cobalt: Definition, Meaning, and Significance Explained
    Cobalt is a fascinating transition metal that has captivated scientists and industries alike with its unique properties As a hard, shiny, silver-white metal, cobalt plays a crucial role in various applications ranging from rechargeable batteries to superalloys
  • About Cobalt - Cobalt Institute
    Cobalt is a critical and essential element used across various sectors of the global economy: electronics, automotive, aerospace, and healthcare





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