6 x 1 hour lessons

This module explores the nature of chemical bonding and the structures formed by different types of particles. You’ll learn how ionic, covalent, and metallic bonds arise and how to use dot-and-cross diagrams to represent bonding in simple compounds.

We’ll also look at shapes of molecules using electron-pair repulsion theory, and explore the impact of electronegativity on bond polarity. The final lessons focus on the structures and properties of giant lattices, simple molecular substances, and metals — explaining melting points, conductivity, solubility, and intermolecular forces.

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By the end of this module, you'll be able to:

• Describe how ionic, covalent, and metallic bonds form

• Draw dot-and-cross diagrams for ionic and covalent compounds

• Predict the shapes of molecules and ions using electron-pair repulsion theory

• Explain the meaning of electronegativity and bond polarity

• Describe and compare the physical properties of ionic lattices, simple molecules, and metallic structures

• Understand how intermolecular forces affect boiling and melting points