NEET Class neet Answered

s orbital is spherical in shape and nearest to the nucleus.

p orbital is dumb-bell shaped and comes next to s orbital.

d orbital is double dumb-bell shaped and comes after p orbital.

f orbital has diffused shape and exists next to d orbital.

 Since, shielding effect is defined as  a reduction in the effective nuclear charge on the electron cloud,

due  to a difference in the attraction forces of the electrons on the  nucleus.

If the electron is in s shell, it means it is nearest to nucleus and if in f shell, it means it is farthest from nucleus.

Since, atomic shielding spends on electron density in a shell and electron density is very less for d and f shells,

hence it has poor shielding effect as compared to s and p shells.

Shielding effect order :-   s > p >  d >  f >