This book is intended for use towards the end of a chemistry course leading to a GCSE examination. Its purpose is to help students with their revision and to improve examination performance. Each chapter begins with a short revision section which deals briefly with the topics addressed. The revision section is followed by worked examples. These enlarge upon the topics presented in the revision section and are designed to show students how to present their answers. Further explanation and advice are given occasionally and enclosed in boxes to separate them from the answers. Finally, there is a section of questions on which students can practise skills and test their knowledge.