Chromium is a chemical element; it has symbol Cr and atomic number 24. It is the first element in group 6. It is a steely-grey, lustrous, hard, and brittle transition metal. [10] Chromium is valued for its high corrosion resistance and hardness.

Chromium is a silver, lustrous, very hard metal that can take a high mirror polish. It is also odorless, tasteless, and malleable. The metal forms a thin protective oxide coating in air. It burns when heated to form green chromium oxide Cr 2 O 3. Chromium is …

Chemical element, Chromium, information from authoritative sources. Look up properties, history, uses, and more.

Chromium compounds are used as industrial catalysts and pigments (in bright green, yellow, red and orange colours). Rubies get their red colour from chromium, and glass treated with chromium has an emerald green colour. Chromium is an essential trace element for humans because it helps us to use glucose. However, it is poisonous in excess.

2025年1月18日 · Chromium, chemical element of Group 6 (VIb) of the periodic table, a hard steel-gray metal that takes a high polish and is used in alloys to increase strength and corrosion resistance. Chromium is a relatively abundant element in Earth’s crust. Its name is from the Greek for color, for the colorations of its compounds.

Chromium is named after the Greek word ‘chroma’ or ‘chromos’ which translates to ‘color’ and references the element’s ability to compose colorful compounds. 75% of chromium produced today is used in alloys such as stainless steel to protect and shine base metals such as …

Most compounds of chromium are colored (why is Cr (CO) 6 white?); the most important are the chromates and dichromates of sodium and potassium and the potassium and ammonium chrome alums. The dichromates are used as oxidizing agents in quantitative analysis, also in …

This is a fitting name, because chromium compounds are often found in vividly colorful shades of green, red, or yellow. As such, chromium compounds historically have found extensive use as pigments for paints. In contrast, elemental chromium is a shiny, hard, yet brittle, steel-gray metal .

Chromium is steel-gray in color. It is shiny, hard and brittle metal, that is easy to break. The density of chromium is 7.1 g.cm- 3. Chromium has a highly polishable texture. It is resistant to tarnishing upon exposure with air. Chromium has outstanding magnetic properties. It is very dense metal and has a thermal conductivity of 93.9 W [4].

Named from the Greek word meaning “color,” chromium is a lustrous, hard, bluish-gray metal. It can be polished to a mirror-like finish and is often used as a decorative and protective plating or finish. Like vanadium, chromium hardens steel, so it …