In a given transition series, there is no signifiecant change in the atomic radii of elements with increse in atomc number. Explain why.

Explanation

In a transition series the electrons are filled in innerd orbitals so there is no increase in the number of shells but there is an increase in the nuclear charge and an increase in the repulsion between inner orbital electrons also. The two opposite forces i.e., increased attraction by the nucleus and increased repulsion between electrons counter balance each other, as a result there is no significant change in atomic radii of transition element.