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The increasing order of atomic radii of ...

The increasing order of atomic radii of the following Group 13 element is

A

`B lt Al lt In lt Ga lt TI`

B

`B lt Al lt Ga lt In lt TI`

C

`B lt Ga lt Al lt TI lt In`

D

`B lt Ga lt Al lt In lt TI`

Text Solution

Verified by Experts

The correct Answer is:
D
Due to poor screening effect of `4f` and `3d` electrons:
(i) Size of `Ga` is less than `Al`.
Hence the overall order is `: BltGaltAlltInltTI`.
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