Water freezes without a chemical reaction. How do its particles move in the ice?
They vibrate about fixed positions
They stop moving completely
They move freely throughout the container
They move past one another as in a liquid
93 exam-style questions on OCR GCSE Chemistry 1.1 The particle model, covering 1.1.1 The particle model and changes of state and 1.1.2 Limitations of the particle model. Each one has a worked solution and a mark scheme showing where the marks go.