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manganese
[mang-guh-nees, -neez]
noun
a hard, brittle, grayish-white, metallic element, an oxide of which, MnO 2 manganese dioxide, is a valuable oxidizing agent: used chiefly as an alloying agent in steel to give it toughness. Mn; 54.938; 25; 7.2 at 20°C.
manganese
/ ˈæŋɡəˌԾː /
noun
a brittle greyish-white metallic element that exists in four allotropic forms, occurring principally in pyrolusite and rhodonite: used in making steel and ferromagnetic alloys. Symbol: Mn; atomic no: 25; atomic wt: 54.93805; valency: 1, 2, 3, 4, 6, or 7; relative density: 7.21–7.44; melting pt: 1246±3°C; boiling pt: 2062°C
manganese
A grayish-white, hard, brittle metallic element that occurs in several different minerals and in nodules on the ocean floor. It is used to increase the hardness and strength of steel and other important alloys. Atomic number 25; atomic weight 54.9380; melting point 1,244°C; boiling point 1,962°C; specific gravity 7.21 to 7.44; valence 1, 2, 3, 4, 6, 7.
See Periodic Table
Word History and Origins
Origin of manganese1
Word History and Origins
Origin of manganese1
Example Sentences
Deep-sea Exploration was covered with these manganese nodules, the subject of the Deep Sea Ventures pilot test nearly five decades ago.
South Africa currently exports a variety of minerals to the US, including platinum, iron and manganese, as well as precious stones, metals and fruit.
Deposits of copper, lead, zinc, silver, nickel, cobalt and manganese are also significant.
Even so, there are still fertilizers and amendments on the market that include “micro-nutrients” such as zinc, manganese and copper that over time can accumulate in the soil, Wallace said.
Heal the Bay found concentrations of aluminum, iron, selenium and manganese that were higher than drinking water standards, sometimes by 10 times as much.
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