What are transition metals? Give four examples.

What are inner transition elements?

Justify the position of lanthanoids and actinoids in the periodic table.

Which is more stable? Fe³⁺ or Fe²⁺ - explain.

Explain the variation in E⁰_{M³⁺/M²⁺}  3d series.

Compare lanthanoids and actinoids.

Explain why Cr²⁺ is strongly reducing while Mn³⁺ is strongly oxidizing.

Compare the ionization enthalpies of first series of the transition elements.

Actinoid contraction is greater from element to element than the lanthanoid contraction, why?

Out of Lu(OH)₃ and La(OH)₃ which is more basic and why?

Why europium (II) is more stable than Cerium (II)?

Why do zirconium and Hafnium exhibit similar properties?

Which is stronger reducing agent Cr²⁺ or Fe²⁺?

The E⁰_M²⁺/M value for copper is positive. Suggest a possible reason for this.

Describe the variable oxidation state of 3d series elements.

Which metal in the 3d series exhibits +1 oxidation state most frequently and why?