The main reason for larger number of oxidation state exhibited by the actinides than the corresponding lanthanides, is

Options

A. more energy difference between `5f` and 6 d-orbitals than between `4f` and `5d`-orbitals
B. lesser energy difference between `5f` and `6d`-robitals than between `4f` and `5d`-orbitals
C. larger atmoic size of actinides than the lanthanides
D. greater reactive nature of the actinides than the lanthanides

Answer

B

Explanation

The main reason for large number of oxidation states exhibited by actinides than corresponding lanthanides is lesser energy difference between `5f` and `6d` orbitals than between `4f` and `5d` orbitals.