AQA GCSE Combined Science: Synergy · 8465
Specification 4.6.2.6 · Paper 3, Paper 4
Revise: Metallic BondingOnce these electrons are delocalised, the remaining particles are positive metal ions. The electrons have not left the metal itself: the structure contains both positive ions and negative delocalised electrons. The electrons are sometimes described as a ‘sea of electrons’ surrounding the ions.