Size of Bk973+ ion is less than that of Np933+ due to actinide contraction.
As we know that in a period from left to right ionic radius decreases and in actinide series it is due to actinide contraction.
Given below are two statement : one is labelled as Assertion A and the other is labelled as Reason R :
Assertion A : Size of Bk3+ ion is less than Np3+ ion.
Reason R : The above is a consequence of the lanthanide contraction.
In the light of the above statements, choose the correct answer from the options given below :
Held on 16 Mar 2021 · Verified 6 Jul 2026.
A is false but R is true
Both A and R are true but R is not the correct explanation of A
A is true but R is false
Both A and R are true and R is the correct explanation of A
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