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Chemistry · PYQ NEET UG 2018
हिन्दीThe CORRECT order of atomic radii in group 13 elements is
Correct answer · Option 4
\( \mathrm{B < Ga < Al < In < Tl} \)
Explanation
Due to poor shielding of d-electrons in Gallium (Ga), its atomic radius is slightly less than that of Aluminium (Al). Thus, the correct order of atomic radii is \( \mathrm{B < Ga < Al < In < Tl} \).
