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chromium
[ kroh-mee-uhm ]
noun
- a lustrous, hard, brittle, metallic element used in alloy steels for hardness and corrosion resistance, as in stainless steel, and for plating other metals: chromium salts are used as pigments and mordants. : Cr; : 51.996; : 24; : 7.1.
chromium
/ ˈkrəʊmɪəm /
noun
- a hard grey metallic element that takes a high polish, occurring principally in chromite: used in steel alloys and electroplating to increase hardness and corrosion-resistance. Symbol: Cr; atomic no: 24; atomic wt: 51.9961; valency: 2, 3, or 6; relative density: 7.18–7.20; melting pt: 1863±20°C; boiling pt: 2672°C
chromium
/ krō′mē-əm /
- A hard, shiny, steel-gray metallic element that is rust-resistant and does not tarnish easily. It is used to plate other metals, to harden steel, and to make stainless steel and other alloys. Atomic number 24; atomic weight 51.996; melting point 1,890°C; boiling point 2,482°C; specific gravity 7.18; valence 2, 3, 6.
- See Periodic Table
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Word History and Origins
Origin of chromium1
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Example Sentences
Unlike metals like iron, which rusts and corrodes dramatically, chromium remains stable after oxidation and subsequent burial.
The coal ash deposits have heavy concentrations of hexavalent chromium, a carcinogen.
RockMelt is built on open-source code—the Chromium software created by Google and used for its own Chrome browser.
A similar result is obtained when the solution of a chromium salt is treated with a solution of ammonium sulphide.
Any chromium present will now be in solution in the easily recognised form of potassic chromate (see “Chromium”).
Just at that moment a big blue sports roadster pushed a bright chromium nose around the corner of the house.
A small beaded screen had been pulled down from the ceiling, facing two chromium-and-leather lounge chairs.
Hydrated chromium sesquioxide is another mineral emerald green.
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