Question

8. Which of the following species will have the largest and smallest size Mg, Mg 2+ , Al, Al 3+

Answer 1

Answer:

Largest size-Mg

Smallest size -Al+3

Answer 2

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+