Question

(a) Why Ca has larger atomic radius than Al? (b) Why 2s2 electron is difficult to remove than 2p electron?

Answer 1

Answer:

a) 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 have already occupied 3d sub shell in Ga.

b) The electrons first fill in the s orbital and then in the p orbital. Normally s orbital is closer to the nucleus than p orbital. So force of attraction of electron by the nucleus is more in s orbital than p orbital . So electron can be easily removed from s orbital than p orbital.

Answer 2

Answer:

i know only answer for a

Explanation:

This is due to the variation in the inner core of the electronic configuration. The presence of additional 10 d-electrons offer only poor screening effect for the outer electrons from the increased nuclear charge in gallium.