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Indium and thallium of III A group have ...

Indium and thallium of III A group have nearly similar atomic radii due to poor screening effect shown by f-electrons in the

A

Penultimate shell of thallium

B

Anti penultimate shell of indium

C

Anti penultimate shell of thallium

D

Penultimate shell of indium

Text Solution

Verified by Experts

The correct Answer is:
C
In and Tl have nearly similar atomic radii due to poor screening effect shown by f-electrons in the anti penultimate shell of Tl.
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