Answer :
Gallium -Ga -outermost valence shell electronic configuration-4s²4p₁
Aluminum-Al-outermost valence shell electronic configuration-3s²3p¹
Before valence shell configuration ,Ga 10 electrons are filled in d-orbitals which has poor shielding effect. so effective nuclear charge will increase and hence Ga will be smaller in size than Al.
As nuclear charge is more, it is difficult to remove an electron from outermost shell of Ga, hence ionization energy is more than Al.
Aluminum-Al-outermost valence shell electronic configuration-3s²3p¹
Before valence shell configuration ,Ga 10 electrons are filled in d-orbitals which has poor shielding effect. so effective nuclear charge will increase and hence Ga will be smaller in size than Al.
As nuclear charge is more, it is difficult to remove an electron from outermost shell of Ga, hence ionization energy is more than Al.
Answer: due to presence less attractive 3d orbital having 10 electron in GA.. there is less attraction between nucleus and this orbital hence nucleus attract valance electron of 4s n 4p orbital with more force hence size of GA decreases n its IP value increases...
Explanation: