Assertion : Atomic radius of Ga is larger than that of aluminium. Reason : Atomic radius always increases down the group.
A
If both (A) and (R) are correct and (R) is the correct explanation of (A).
B
If both (A) and (R) are correct, but (R) is not the correct explanation of (A).
C
If( A) is correct, but (R) is incorrect.
D
If both (A) and (R) are incorrect.
Text Solution
Verified by Experts
The correct Answer is:
D
Atomic radius of Ga is less than that of Albecause of the presence of 10 d-electrons which offer poor screening effect for the outer electrons from the increased nuclear charge in gallium.
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