The reason for small radius of Ga compared to Al is ……..A. poor screening effect of d and f-orbitalsB. increase in nuclear chargeC. presence of higher orbitalsD. higher atomic number

The reason for small radius of Ga compared to Al is ……..A. poor sc

1.	The reason for small radius of Ga compared to Al is ……..A. poor screening effect of d and f-orbitalsB. increase in nuclear chargeC. presence of higher orbitalsD. higher atomic number
Answer» Correct Answer - A::B On moving down the group from Al to Ga, atomic radius decrease (exception) due to poor shielding by d-electrons. On moving form Al to Ga, shielding effect n d-electrons is unable to compensate increased nuclear charge. Hence, successive increase of atomic radius as expected is not observed.

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The reason for small radius of Ga compared to Al is ……..A. poor screening effect of d and f-orbitalsB. increase in nuclear chargeC. presence of higher orbitalsD. higher atomic number

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