A complete, ready-to-use lesson PowerPoint introducing chemical formulae and the periodic table for KS3 or GCSE Chemistry students. This resource expertly builds from the basics of atoms to writing chemical formulas, guiding students through elements, compounds, and mixtures with clear definitions and diagrams. What’s inside? Engaging Starter: A ‘Do Now’ matching activity to assess prior knowledge of elements, compounds, and mixtures. Clear Learning Objectives: Differentiated outcomes (Level 6) focused on using the periodic table, identifying groups, and deducing atoms from chemical formulas. Scaffolded Content: Step-by-step explanations of chemical symbols vs. formulas, with worked examples (e.g., H₂O, CaCO₃) and student practice questions. Critical Thinking Tasks: A ‘Green Pen Challenge’ and a task to correct common student mistakes about the periodic table’s structure. Assessment for Learning: Includes a ‘Stamp the Learning’ quiz with full answers, a true/false exit ticket, and a structured 6-mark extended writing task with peer marking guidance. Key Vocabulary: Covers atoms, molecules, diatomic elements, metals/non-metals, groups, periods, and the story of Mendeleev. Perfect for a stand-alone lesson, this slideshow saves you planning time and provides everything needed to solidify students’ understanding of these fundamental chemistry concepts.