How do you explain that 31Ga …
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Gaurav Seth 6 years, 1 month ago
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.
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