It covers the three external Achievement Standards: Chemistry 2.4 Demonstrate understanding of bonding, structure, properties and energy changes Chemistry 2.5 Demonstrate understanding of the properties of selected organic compounds Chemistry 2.6 Demonstrate understanding of chemical reactivity This workbook has brief exam revision notes for end-of-year study, with examples and NCEA exam questions from 2020 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.