It covers the three external Achievement Standards: Chemistry 3.4 Thermochemical principles and the properties of particles and substances Chemistry 3.5 Properties of organic compounds Chemistry 3.6 Equilibrium principles in aqueous systems This workbook has brief exam revision notes for end-of-year study, with examples and NCEA exam questions from 2021 and earlier years. Full answers with explanations and A, M, and E grades are given. Use this workbook all year round or during Terms 3 and 4 to revise and practise exam questions.