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manganese    音标拼音: [m'æŋgən,iz]
n. 锰[金属元素]

锰[金属元素]

manganese
n 1: a hard brittle grey polyvalent metallic element that
resembles iron but is not magnetic; used in making steel;
occurs in many minerals [synonym: {manganese}, {Mn}, {atomic
number 25}]

Manganese \Man`ga*nese"\, n. [F. mangan[`e]se, It. manganese,
sasso magnesio; prob. corrupted from L. magnes, because of
its resemblance to the magnet. See {Magnet}, and cf.
{Magnesia}.] (Chem.)
An element obtained by reduction of its oxide, as a hard,
grayish white metal, fusible with difficulty (melting point
1244[deg] C), but easily oxidized. Its ores occur abundantly
in nature as the minerals pyrolusite, manganite, etc. Symbol
Mn. Atomic number 25; Atomic weight 54.938 [C=12.011].
[1913 Webster PJC]

Note: An alloy of manganese with iron (called ferromanganese)
is used to increase the density and hardness of steel.
[1913 Webster]

{Black oxide of manganese}, {Manganese dioxide} or {Manganese
peroxide}, or {Black manganese} (Chem.), a heavy black powder
{MnO2}, occurring native as the mineral pyrolusite, and
valuable as a strong oxidizer; -- called also familiarly
{manganese}. It colors glass violet, and is used as a
decolorizer to remove the green tint of impure glass.
[1913 Webster]


Mn \Mn\, n. (Chem.)
The chemical symbol for {manganese}.
[PJC]

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  • Manganese - Wikipedia
    Manganese is a chemical element; it has the symbol Mn and atomic number 25 It is a hard, brittle, silvery metal, often found in minerals in combination with iron
  • Manganese - Uses, Side Effects, and More - WebMD
    Manganese is the twelfth most common element on the earth's crust In the body, it's involved in many chemical processes, including the processing of cholesterol, carbohydrates, and protein
  • Manganese - Health Professional Fact Sheet - Office of Dietary Supplements
    Manganese is an essential trace element that is naturally present in many foods and available as a dietary supplement Manganese is a cofactor for many enzymes, including manganese superoxide dismutase, arginase, and pyruvate carboxylase [1, 2]
  • Manganese: Health Benefits, Good sources, Deficiency, Dosage - Mayo . . .
    Manganese is an essential mineral for bone, metabolism, and brain health Learn its benefits, top food sources, deficiency signs, and recommended dosage
  • Manganese: Health benefits and side effects - Medical News Today
    Manganese is a trace mineral It is vital for the human body, but people only need it in small amounts Health benefits of manganese can include providing antioxidants, supporting bone health,
  • Manganese | Uses, Facts, Compounds | Britannica
    Manganese, chemical element that is a silvery white, hard, brittle metal of Group 7 in the periodic table It was recognized as an element in 1774 by the Swedish chemist Carl Wilhelm Scheele Although rarely used in pure form, manganese is essential to steelmaking
  • 5 Health Benefits of Manganese
    Your body needs manganese for healthy bones, reproduction and immunity, to create energy and for blood clotting Despite being a trace mineral, the effects of manganese are mighty
  • Manganese in Drinking Water
    Manganese is the 12th most abundant element of the earth’s crust, which makes it ubiquitous in the environment It can naturally occur in both surface water and groundwater sources





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