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dunno The element was disc everyplaceed by Louis Nicolas Vauquelin in 1797. He named it nuclear number 24 later on the Greek word “ colour” meaning “ falsify” because of the some(prenominal) distinguishable colourise of its compounds. atomic number 24 is a precise common element. It ranks, over all, about 21st in inseparable abundance among elements in crustal rocks. It’s melting headspring is 1,857 degrees Celsius, boil point is 2,672 degrees Celsius, and has a specific gravity of 7.2. Chromium plenty replace grapheme of the aluminum and iron in many minerals, giving them their preposterous colors. Many precious stones owe their colors to atomic number 24 compounds. In chromites and chromic salts, chromium has a valency of +3.

just about of these compounds atomic number 18 green, but some be red or blue. Chromic oxide (Cr2O3) is a green solid. In chromates and dichromates, chromium has a valence of +6. thousand dichromate (K2Cr2O7) is a red, water-soluble, entangled with gelatin, gives Bibliography: ...If you want to larn a full essay, order it on our website: Orderessay

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