Question

What is shielding effect?

Answer 1

                            shielding effect / screening effect
                       ---------------------------------------------------
In multi electron atoms, the outer-most electron do not feel the complete nuclear attraction bcoz they are shielded by inner electrons. This is called as Shielding effect.

Shielding effect is inversely propotional to ionization Enthalpy.

Answer 2

shielding effect

when the electron and nucleus in atom have a decrease in attraction which changes the nuclear charge. is called shielding effect .

nuclear fission is an example of shielding effect