Question

Explain how atomic size and nuclear effective charge are related.

Answer 1

The nuclear effective charge is very much related to the atomic size of the element.

The attraction of electrons by the positive nucleus is shielded by the core electrons present in its orbits. The more the size of atom , more are the core electrons , and higher is the shielding. Due to increase in shielding , the effective charge of the element decreases.

So the larger atoms have lesser effective charges whereas the smaller ones have higher nuclear effective charges.