Question

The reason for greater range of oxidation states in actinoids is attributed to

• A. Actinoid contraction
• B. 5f, 6d and 7s levels having comparable energies
• C. 4f and 5d levels being close in energies
• D. The radioactive nature of actionoids.

Answer 1

The correct option is B 5f, 6d and 7s levels having comparable energies

Actinoids have a greater range of oxidation states due to comparable energies of 5f, 6d and 7s orbitals. Hence, all their electrons can take part in bond formation.