CHROMIUM

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CHROMIUM

• By Sean Gold
• Materials Processing
• Monday/Wednesday

2
Introduction

• Discovered by Louis Vauquelin.
• Discovered in France in 1797.
• The name Chromium is Greek.

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Processing

• Chromium is found naturally in rocks, soil,
  plants, and animals.
• Occurs in the combination with other elements
  such as chromium salts.
• The pure metallic does not occur naturally.

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Properties

• Symbol Cr
• Atomic 24
• Atomic Weight 51.9961
• Group 6
• Period 4
• Melting Pt 1857 C
• Boiling Pt 2672 C
• Density 7.19

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Solid State

• Standard state is solid at 298K.
• Color is a silvery metallic.
• Hard and brittle.

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Applications

• Mainly used to make stainless steel and other
  alloys.
• Used in plating for car parts, tools, knives,
  camouflage paint, stereos, video tapes, and
  lasers.
• Gives the color to rubies and emeralds.

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Conclusion

• In conclusion Chromium is a hard yet brittle
  metal that is very good when plating. Its good
  for making products look appealing and shiny for
  a cheap price.

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Work Sited

• http//www.webelements.com/webelements/elements/te
  xt/Cr/key.html
• http//environmentalchemistry.com/yogi/periodic/Cr
  .html