Secondary 1 Chemistry Free Notes

Chemistry in Secondary 1 is all about understanding the stuff around us – what things are made of, how they behave, and why they change. Think of it as learning the rules behind everyday things like cooking, rusting, melting ice, or even why air takes up space. Last updated 17 January 2026 On this page Introduction to Chemistry: What Is Chemistry? Chapter 1: States of Matter Chapter 2: Physical vs Chemical Changes Chapter 3: Elements, Compounds and Mixtures Chapter 4: Separa