(A) The $5f$ orbitals extend further from the nucleus compared to the $4f$ orbitals. Due to this,the $5f$ electrons are less tightly held by the nucle

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the $5f$ orbitals extend further from the nucleus than the $4f$ orbitals

(A) The $5f$ orbitals extend further from the nucleus compared to the $4f$ orbitals. Due to this,the $5f$ electrons are less tightly held by the nucleus and are more available for bonding. Consequently,the actinoids exhibit a greater variety of oxidation states compared to the lanthanoids.

Class 12 Chemistry d-and f-Block Elements Lanthanoids and Actinoids

Medium

The actinoids exhibit a greater number of oxidation states in general than the lanthanoids. This is because

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A
the $5f$ orbitals extend further from the nucleus than the $4f$ orbitals
B
the $5f$ orbitals are more buried than the $4f$ orbitals
C
there is a similarity between $4f$ and $5f$ orbitals in their angular part of the wave function
D
the actinoids are more reactive than the lanthanoids