(A) The energy difference between $5f$ and $6d$ orbitals is lesser than that between $4f$ and $5d$ orbitals.This allows electrons in actinoids to be r

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Lesser energy difference between $5f$ and $6d$ than $4f$ and $5d$ orbitals

(A) The energy difference between $5f$ and $6d$ orbitals is lesser than that between $4f$ and $5d$ orbitals.This allows electrons in actinoids to be removed from both $5f$ and $6d$ subshells,leading to a greater variety of oxidation states compared to lanthanoids.

Class 11 Chemistry Data Entry - Chemistry Level 0 of all question bank

Larger number of oxidation states are exhibited by the actinoids than those by the lanthanoids,the main reason being

A
Lesser energy difference between $5f$ and $6d$ than $4f$ and $5d$ orbitals
B
More energy difference between $5f$ and $6d$ than between $4f$ and $5d$ orbitals
C
More reactive nature of the actinoids than the lanthanoids
D
$4f$ orbitals are more diffused than $5f$ orbitals