The reason for small radius of Ga compared to Al is ……

1.	The reason for small radius of Ga compared to Al is ……
Answer» poor screening effect of d and f-orbitals. increase in NUCLEAR charge. PRESENCE of HIGHER orbitals. higher atomic number. Solution :On moving down the group from AL to Ga, the atomic radii decreases DUE to shielding effect of d-electrons. This effect is poor hence, effective nuclear charge increases.

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