5 x 1 hour lessons

This module revises the key bonding models that underpin much of chemistry. You’ll review ionic, covalent (including dative covalent), and metallic bonding, and link these models to physical properties such as melting point and electrical conductivity. You’ll also explore how molecular shape arises from electron pair repulsion, how to determine shape from formula, and how to explain polarity and intermolecular forces—skills that are frequently tested in both theory and practical questions.

By the end of this module you will be able to:

• explain and compare ionic, covalent, dative covalent, and metallic bonding

• relate bonding and structure to melting/boiling point, conductivity, and solubility

• determine the shape of molecules and ions using the electron pair repulsion model

• predict and explain molecular polarity based on bond polarity and shape

• describe and compare intermolecular forces: induced dipole–dipole interactions, permanent dipole–dipole interactions, and hydrogen bonding

• link types of intermolecular force to physical properties such as boiling point and solubility

AQA Specification Points: 1.9 Ionic Bonding 1.10 Nature of covalent and dative covalent bonds 1.11 Metallic bonding 1.12 Bonding and physical properties 1.13 Shapes of simple molecules and ions 1.14 Bond polarity 1.15 Forces between molecules