Why atomic models change
Why atomic models change
An atomic model is a scientific description of what an atom contains and how its parts are arranged. Atoms are too small to see directly, so scientists use experimental evidence to decide whether a model is useful.
Step-by-step lessons on OCR GCSE Chemistry 1.2.1 Development of the atomic model. 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.