Question

Why atomic radii decrease with increase in nuclear charge

Answer 1

when the charge is increase then the attraction b/w the atom outer shell or nuclear is increses then the atom is shrink and decreases its radius

Answer 2

Let's consider an atom containing many shells named K,L,M,N.......we know that nucleus is positively charged ..and electrons are negatively charged..the force applied by the nucleus to pull electrons towards itself is nuclear charge..if nuclear charge increases the force acting on the electrons increases..and tend to come towards nucleus...as the electrons try to come towards the nucleus there will be shrinking of size...due to which size decreases therefore atomic radii also decreases...