Electron transfer
Electron transfer
An electron is a negatively charged subatomic particle that can be transferred between species. Oxidation is the loss of electrons, while reduction is the gain of electrons.
Step-by-step lessons on AQA GCSE Chemistry 4.1.4 Oxidation and reduction in terms of electrons (HT only). 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.