PART-II CHEMISTRY
SECTION-A
Given below are two statement: one is labelled as Assertion A and the other is labelled as Reason R:
Assertion A: Size of 
ion is less than 
ion.
Reason 
: The above is a consequence of the lanthanoid contraction.
In the light of the above statements, choose the correct answer from the options given below:
is true
and 
are true and 
is the correct explanation of 
is true but 
is false
Text Solution
Verified by ExpertsC
Size of 
ion is less than that of 
due to actinoid contraction. As we know that in a period from left to right ionic radius decreases and in actinide series it is due to actinoid contraction.
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