Friday 10 April 2015

1h) Metallic Crystals

Metals
  • Have a giant structure of positive ions surrounded by free electrons
  • Are held together by metallic bonding. They have a giant structure of positive ions surrounded by a sea of de-localised (free) electrons
  • The attraction between the positive ions and electrons is called 'metallic bonding'
    It is the metallic bonding which gives metals their properties
Properties 
  • hammered/ bent into shape 
  • good conductors of heat and electricity due to the free electrons which carry the electrical  
  • strong 
  • malleable- atoms in a regular pattern in layers slide over eachother and can be hammered into shape

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