A great way to go through a few skills and common questions for GCSE chemistry exam prep. Suitable for most exam boards. Recap ALL the following topics with your students before the exam! Can be teacher led or independent revision tasks. All answers are on the slides. States of matter chemical and physical changes water treatment stages Simple distillation Calculating proton, electron neutron/isotopes. Calculating empirical formula concentration = mass/volume balancing equations produce copper sulphate crystals Metallic bonding Electrolysis gas tests.