Question

which have largest size.Mg,Na,Na+,Mg2+,Al3+,Al​

Answer 1

Explanation:

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+ .

Answer 2

Explanation:

Among the isoelectronic ions `Na^(+),Mg^(2+) and Al^(3+),Na^(+)` ion have the largest size.