Question

9. out of themwhich of the following species will have the smallest atomic size _Na, Mg2+, Al, Al3+ ?​

Answer 1

Answer:

Mg, Mg2+, Al, Al3+. Atomic radii decrease across a period, cations are smaller than their parent atoms. Among isoelectronic ions, the one with the larger positive nuclear charge will have a smaller radius. Hence the largest species is Mg and the smallest one is Al3+ .