A kite is an example of what? (A) A system

(B)A process

(C)A pattern

(D)A change

I think it is the process

Explanation:

Reduction in effective nuclear charge due to the filling of 3d sub-shell

Explanation:

Although, according to the trend in the periodic table, the size of shell go on increasing but an anomaly in Group 13 s observed in case of Aluminium and Gallium. Gallium should have a bigger shell configuration according to the trend but it is small as compared due to the first filling of 3d sub-shell by electron as we can see from their electronic configurations as:

Aluminium = [Ne] 3s² 3p¹

Gallium = [Ar] 3d10 4s2 4p1