Question

Define screening effect

Answer 1

Screening effect: The screening effect is the phenomenon of shielding valence electrons by the inner shell electrons from the nuclear force of attraction.

• .Screening effect is also known as the Shielding effect.
• The greater the screening effect, the weaker will be the force of attraction for the valence electrons. So, it becomes easy to remove an electron from the valence shell.
• Hence, the screening effect is inversely proportional to Ionization energy.
• The decreasing order of shielding effect of orbitals: $s>p>d>f$