4 x 1 hour lessons

This module introduces the unique chemistry of the transition elements, focusing on what defines a transition metal and their general properties. You’ll learn about variable oxidation states, formation of coloured ions, and their role as catalysts.

The module also covers complex ion formation, including ligands, coordination numbers, and the shapes of complexes. You’ll explore ligand substitution and precipitation reactions, as well as the stability and colour changes associated with these processes.

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

• Define transition elements and identify their characteristic properties

• Explain why transition metal ions form coloured compounds

• Describe how ligands coordinate with transition metals to form complexes

• Predict the shapes and coordination numbers of common complexes

• Understand ligand exchange and precipitation reactions involving transition metal complexes

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OCR (A) specification points covered: 5.3.1 Transition elements