Inside an atom
Inside an atom
Atoms contain three types of subatomic particle: protons, neutrons and electrons. A subatomic particle is smaller than an atom and forms part of its structure.
Protons have a relative electrical charge of +1+1+1, neutrons have a relative electrical charge of 000, and electrons have a relative electrical charge of −1-1−1.
Step-by-step lessons covering AQA GCSE Chemistry 1.1.4 Relative electrical charges of subatomic particles for Foundation and Higher tier. Each lesson works through exam-style questions in Paper 1 and Paper 2 format. Nail the core quantitative topics — moles, balancing equations and calculations — early on, since they underpin higher-tier questions across every paper and topic.
