Transition metals, configurations and oxidation statesEdexcel International A Level Chemistry: Mind map

Exam questions on Transition metals, configurations and oxidation states

1. A technician prepares aqueous solutions of salts of Period 4 d-block metals for a titration practical and records the electronic configurations of the metal atoms and ions involved.
   Deduce the full electronic configurations of an iron atom and of an Fe³⁺ ion.2 marks
2. Scandium, copper and zinc are all Period 4 elements in the d-block. Scandium forms only the Sc³⁺ ion in its compounds and zinc forms only the Zn²⁺ ion. Copper forms both Cu⁺ and Cu²⁺ ions.
   Explain why zinc is not classed as a transition metal.2 marks
3. Manganese forms compounds in a wide range of oxidation states. A chemist has samples of manganese(IV) oxide, MnO₂, potassium manganate(VI), K₂MnO₄, and potassium manganate(VII), KMnO₄.
   Deduce the oxidation number of manganese in MnO₂, in K₂MnO₄ and in KMnO₄.3 marks