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  4. The correct order of atomic radii in group 13 elements is

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Q. The correct order of atomic radii in group 13 elements is

NTA AbhyasNTA Abhyas 2020The p-Block Elements - Part2

Solution:

Ga is little smaller or have slightly lower atomic radius due to poor Screening effect by inner $3d$ electrons .
Elements B Ga Al In TI
Atomic radii (pm) 85 135 143 167 170