The metallic structure
The metallic structure

A metal is a giant lattice of positive metal ions surrounded by a sea of delocalised electrons. Each metal atom releases its outer-shell electrons, which become shared across the whole structure.
Step-by-step lessons on AQA GCSE Chemistry 2.2.8 Metals as conductors. Each one builds up to exam-style questions. Nail the core quantitative topics — moles, balancing equations and calculations — early on, since they underpin higher-tier questions across every paper and topic.