Metals

• Why are alloys harder than pure metals?

  -Other size atoms distort the layers

  -So they can no longer able to slide
• Why are metals malleable?

  Positive ions can slide over each other which doesn’t break bonds
• Why do metals conduct?

  -Delocalised electrons

  -Move through the structure

  -Carried charge
• Why do metals have a high melting point?

  -There is a strong electrostatic attraction between positive metal ions and negative electrons.

  -Which requires a lot of energy to overcome.

  -Giant 3D structure
• Metal structure 


  -Rows of metal ions

  -Sea of delocalised electrons

  -Giant structure