Question

Why is there loss of electrons from penultimate shell?

Answer 1

This increases the screening effect by larger number of electrons. Thus, theeffective nuclear charge on the outer most electron decreases more than that has been observed in d-block elements. Penultimate shell means the 2nd last shellin which electrons are filled in an atomic orbital.

Answer 2

Explanation:

This increases the screening effect by larger number of electrons. Thus, theeffective nuclear charge on the outer most electron decreases more than that has been observed in d-block elements. Penultimate shell means the 2nd last shellin which electrons are filled in an atomic orbital.