Question

Why atomic size of Gallium and Germanium is same?​

Answer 1

Answer:

poor screening effect of d-electrons for the outer electrons from an increased nuclear charge.

Reason:-

The presence of additional 10d electrons in gallium offers poor screening effect for the outer electrons which increases the force of attraction between the outermost electrons and nuclear charge, due to which the atomic radius of gallium decreases.

Hence, Ga has a lower atomic radius as compared to Al.

Explanation:

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