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The increasing order of atomic radii of ...

The increasing order of atomic radii of the following group 13 elements is

A

`AI gt Ga gt In gt TI`

B

`Ga lt Al lt In lt TI`

C

`Al lt In lt Ga lt TI`

D

`Al lt Ga lt TI lt In`

Text Solution

Verified by Experts

The correct Answer is:
B
The order of radius of `13^(th)` group elements is `Ga lt Al lt In lt Tl`. Reason `rArr` Due to poor shielding effect of d-orbital, radius of Ga is smaller than Al
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