Lesson 2: Variable Oxidation States and Catalytic Properties
This lesson delves into two of the most significant properties of transition metals.
- Variable Oxidation States: One of the most characteristic features of d-block elements is their ability to show a wide range of oxidation states. This is due to the small energy difference between the and orbitals, which allows both to participate in bonding. For example, manganese (Mn) can show oxidation states from +2 to +7. Students will learn how to predict the most stable oxidation state and how it trends across a period.
- Catalytic Properties: Many transition metals and their compounds act as excellent catalysts in various chemical reactions. This is attributed to their ability to:
- Form variable oxidation states, which allows them to participate in reaction intermediates.
- Provide a large surface area for reactants to adsorb.
- Form complex compounds with reactants, creating a lower energy pathway for the reaction.
