Metallic Bonding (AQA GCSE Combined Science: Trilogy): Revision Note Exam code: 8464

Metallic Bonding (AQA GCSE Combined Science: Trilogy): Revision Note

Exam code: 8464

Metallic structure

Metallic structure

  • Metals consist of giant structures of atoms arranged in a regular pattern

  • Electrons in the outer shell of metal atoms are lost

  • Individual metal atoms are held together by strong metallic bonds forming a lattice structure

  • This type of bonding occurs in metals and metal alloys, which are mixtures of metal

  • Within the metal lattice, the atoms lose their valence electrons and become positively charged metal ions

  • The valence electrons no longer belong to any specific metal atom and are said to be delocalised

  • This means they can move freely between the positive metal ions and act like a “sea of electrons”

Metallic structure

Representation of metallic bonding

Diagram showing the ways of representing a metal lattice structure with delocalised electrons

Examiner Tips and Tricks

Delocalised electrons are not transferred as in ionic bonding, they are merely moving freely in the spaces in-between the nuclei of metal atoms.


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