'''ક્રોમિયમ''' એ એક [[રાસાયણિક તત્વ]] છે જેની સંજ્ઞા '''Cr''' અને [[અણુ ક્રમાંક]] ૨૪ છે. તે Itસમૂહ is- the૬ firstનું elementપ્રથમ inતત્વ [[Groupછે. 6આ element|Groupએક 6]]સ્ટીલ રાખોડી રંગની ચળકતી સખત ધાતુ છે જેને ઘસીને ખૂબ સારી રીતે ચળકાવી શકાય છે અને તેનું ગલન બિંદુ ખૂબ ઊંચુ હોય છે. It is a steely-gray, [[Lustre (mineralogy)|lustrous]], hard [[metal]] that takes a high polish and has a high melting point. It is also odorless, tasteless, and malleable. The name of the element is derived from the [[Greek language|Greek]] word "chrōma" (χρώμα), meaning [[colour]],<ref>[http://www.perseus.tufts.edu/hopper/text?doc=Perseus%3Atext%3A1999.04.0057%3Aentry%3Dxrw%3Dma χρώμα], Henry George Liddell, Robert Scott, ''A Greek-English Lexicon'', on Perseus</ref> because many of its compounds are intensely coloured. Chromium oxide was used by the Chinese in the [[Qin dynasty]] over 2,000 years ago to coat weapons such as bronze crossbow bolts and steel swords found at the [[Terracotta Army]]. It later came to the attention of the west when it was discovered by [[Louis Nicolas Vauquelin]] in the mineral [[crocoite]] ([[lead(II) chromate]]) in 1797. Crocoite was used as a pigment, and after the discovery that the mineral chromite also contains chromium, this latter mineral was used to produce pigments as well.
Chromium was regarded with great interest because of its high [[corrosion]] resistance and hardness. A major development was the discovery that steel could be made highly resistant to corrosion and discoloration by adding chromium to form [[stainless steel]]. This application, along with [[chrome plating]] ([[electroplating]] with chromium) are currently the highest-volume uses of the metal. Chromium and [[ferrochromium]] are produced from the single commercially viable ore, chromite, by silicothermic or [[aluminothermic reaction]] or by [[Roasting (metallurgy)|roasting]] and [[Leaching (metallurgy)|leaching]] processes.
