More complex patterns of the Periodic Table — WJEC A-Level Chemistry
In summary: More complex patterns of the Periodic Table is a key topic in WJEC A-Level Chemistry. Key exam tip: Ensure you can draw 3D representations of octahedral and tetrahedral complexes
Exam Tips for More complex patterns of the Periodic Table
- Ensure you can draw 3D representations of octahedral and tetrahedral complexes
- Practice writing ion/electron half-equations for disproportionation reactions
- Be prepared to explain the splitting of d-orbitals in terms of ligand interaction
- Memorize the specific colours of common transition metal ions in aqueous solution
Common Mistakes
- Confusing the inert pair effect with general group trends
- Misidentifying the coordination number in ligand exchange reactions
- Incorrectly explaining the origin of colour in transition metal complexes
- Failing to distinguish between heterogeneous and homogeneous catalysis mechanisms
Marking Points
- Amphoteric behaviour of Al and Pb
- Inert pair effect in Groups 3, 4, and 5
- Donor-acceptor compounds (e.g., NH3.BF3)
- Structure and bonding in boron nitride
- Relative stability of oxidation states in Group 4
- Acid-base properties of CO2 and PbO
- Trends in bonding of Group 4 chlorides
- Disproportionation reactions of chlorine
← Back to Chemistry WJEC A-Level Specification · All Chemistry Topics