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Why Gallium has smaller size than aluminimum? Explain your answer briefly

Why Gallium has smaller size than aluminimum? Explain your answer briefly

Grade:11

2 Answers

The Hounds Of Justice
125 Points
5 years ago
Gallium comes after 3d series, d subshell is a poor screener and due to this Zeff increases and hence size decreases.
Arun
25750 Points
5 years ago
The atomic radius of the Ga is less than Al because of poor screening effect. Theatomic radius of Ga is slightly lesser than of Al because in going from Al to Ga, the electrons havealready occupied 3d sub shell in Ga.

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