Question

Why fall in ionization energy occurs at Al ans S i s same period

Answer 1

Electronic configuration of elements

Mg = [ Ne ] 3s^2

Al = [ Ne ] 3s^2 3p^3

p = [ Ne ] 3s^2 3p^3

S = [ Ne ] 3s^2 3p^4

Now, E.C of mg and p are stable Diego which large amount of energy is required to remove an electron but for AI and S less amount of required as they have unstable E.C.....

Hope it helps u.....