Question

The screening effect of $d-$electrons is

• A. Equal to the $p-$electrons
• B. More than $p-$electrons
• C. Same as $f-$electrons
• D. Less than $p-$electrons

Answer 1

The correct option is D Less than $p-$electrons

Penetration describes the proximity of electrons in an orbital to the nucleus. Electrons that have greater penetration can get closer to the nucleus and effectively block out the charge from electrons that have less proximity and hence have higher screening effect.
For the same value of n, the order of penetrating power is
$s>p>d$. The screening effect also follows the same order.


Hence the screening effect of d-electron is less than $p-$electrons .