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Chromium (Jeff Jansen)


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Chromium (Jeff Jansen)

  1. 1. By: Jeff Jansen
  2. 2.  Chromium Atomic Number: 24 Atomic Mass: 51.9961 Group: 6 Period: 4 Color: silvery metallic Founder: Louis- Nicholas Vauquelin in 1797 Location: Peru Greek word for colour is ‘chroma’
  3. 3.  Founder of Chromium and Beryllium Started with crocite and used HCl to precipitate the chromium oxide then heated to obtain the metal. Analyzed emerald in Peru and realized the color in it is chromium
  4. 4.  Solid at room temperature Silvery metallic color Melting point: 2180 K (1907 C or 3465 F) Boiling point: 2944 K (2671 C or 4840 F) Density: 7.15 g/cm2 Major isotopes: Cr 50, 52, 53, 54 Uses: chrome plating, paints, hardens steel, armor plates, safes, ball bearing, cutting tools
  5. 5.  Cr2O3- green pigment K2Cr2O7- tanning leather PbCrO4- yellow pigment Used for fire brick molds due to its high melting point
  6. 6. Chrome hardened Armor Plate Chrome oxide green steel (paint)Chromeplated safe Chrome ball bearings
  7. 7.  Element is found in South Africa, India, Kazakhstan, Zimbabwe, Finland, Iran, Brazil The chromite ore is obtained from mining Price of chromium: $6.27 per pound
  8. 8.  Candian Nickel 1952- made of 1952 steel covered in chrome Chromium is antiferromagnetic below room temperature. Becomes Paramagnetic above 38 degrees Celsius Chromium is the 21st most abundant element in the Earths crust. It is present at a concentration of approximately 100 ppm. Maybe found in the same vicinity as diamonds
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