Question

What is screening Effect?

Answer 1

Screening Effect

• The screening effect or shielding effect is the phenomenon of the reduction of the force of attraction of the nucleus on the outermost valence electrons due to the presence of the inner shell electrons.
• The outermost electrons experience attraction force from the nucleus and repulsion from the inner shell electrons.
• It can also be said as the shielding effect is the reduction in the nuclear charge on the outermost electron cloud.
• The order of screening effect in the shells is $s>p>d>f$.