Book excerpt: The only textbook that completely covers the Oxford AQA International AS & A Level Chemistry specification (9620), for first teaching in September 2016. Written by experienced authors, the engaging, international approach ensures a thorough understanding of complex concepts and provides exam-focused practice to build exam confidence. Help students develop the scientific, mathematical and practical skills and knowledge needed for Oxford AQA assessment success and the step up to university. Ensure students understand the bigger picture, supporting their progression to further study, with synoptic links and a focus on how scientists and engineers apply their knowledge in real life.