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Why do the actinoids exhibit higher number of oxidation states than lanthanoids?
Question

Why do the actinoids exhibit higher number of oxidation states than lanthanoids?

A.

4f orbitals are more diffused than the 5fbitals.

B.

Energy difference between 5f and 6d is less with respect to the energy difference between 4f and 5d.

C.

Energy difference between 5f and 6d is more with respect to the energy difference between 4f and 5d.

D.

Actinoids are more reactive in nature that the lanthanoids.

Correct option is B

Actinides exhibit larger oxidation states than lanthanides, because of the very small energy gap between 5f, 6d and 7s subshells. Thus, the outermost electrons get easily excited to the higher energy levels, giving variable oxidation states.

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