Metal Elements

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Metal Elements
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In the Earths Crust

• Metals account for 25 of the earths crust

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Metalurgy

• The science and technology of retrieving metal
  elements and making them useful.
• Extraction..
• Modification
• Alloying..

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Extraction

• Few pure metals are found in nature.
• They must be extracted from minerals
• Minerals
• Solid and pure
• Occur in the crust
• Contain metalic elements
• Name often ends with ite

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Extraction

• Metal is extracted from mineral ore in two main
  stages
• crush it (physical) and burn it (chemical)
• crush it (physical) and electrocute it (chemical)
• crush it (physical) and disolve it (chemical)
• Burn pyrometallurgy
• Electrocute electrometallurgy
• Dissolve hydrometallurgy

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Extraction

• Extraction is simply a form of decomposition

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Modification

• Altering the properties of a pure metal without a
  chemical change

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Alloying

• Properties of a metal can be changed by mixing
  another element with it.