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  • metals
    • sea of free electrons
      • delocalised electrons come from the outer shell of every metal atom
      • free electron ca move throughout the whole structure freely and therefore are good conductors of electricity and heat.
      • electrons hold the metal in a regular structure- strong force of electrostatic attraction between positive ions and negative electrons
      • electrons also allow atoms to slide over eachother making the malleable (easy to bend and shape).
    • alloys are a mixture of two or more metals which means they have different sized atoms in their structure- this makes the structure more strong as the atoms cant slide or move past eachother as easily.
    • when metals ionise they become positively charged because they lose an electron/s in their highest energy charge.
    • the number of charge on and ion of a metal is equal to the group number of the metal


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