S2.4 Bonding Triangle (IBDP Chemistry)

BUNDLE S2.4 From Models to Materials SL Content (IBDP Chemistry)

This bundle of PowerPoints covers IBDP Chemistry SL only content of Topic 2.4: From Models to Materials (first examination 2025) and provides a complete, structured sequence of lessons linking bonding models to real-world materials. Designed specifically for the updated IB Diploma Programme specification, this resource helps students move from abstract bonding theory to explaining and predicting material properties. Topic 2.4 focuses on how ionic, covalent and metallic bonding models can be used to understand the physical properties of substances and materials. Across the bundle, students explore bonding as a continuum (using the bonding triangle and electronegativity data), properties of materials, metallic bonding, alloys, polymers and addition polymers. Clear worked examples and structured tasks guide learners in applying models to explain melting point, electrical conductivity, hardness, malleability, brittleness and flexibility. The lessons include: • Starter activities (retrieval and true/false questions) • Clear definitions of key terms (e.g. flexibility, malleability, alloy, electronegativity) • Bonding triangle classification using electronegativity values • Structured explanations linking structure → bonding → properties • Alloy structure (substitutional and interstitial) and phase diagrams • Polymer structure and addition polymerisation • Practice questions and discussion tasks Each file is provided as a fully editable .pptx PowerPoint, allowing you to adapt slides to your class context. This bundle is ideal for teaching, revision, or consolidation of SL 2.4 content and supports conceptual understanding, exam-style thinking and the IB Nature of Science emphasis on models and their limitations. It can be used as a full teaching sequence or as standalone lessons within your DP Chemistry course.