Q. The smallest among the following ions is
A) $Na^{+}$
B) $Mg^{2 +}$
C) $Ba^{2 +}$
D) $Al^{3 +}$
Explanation
(d)
The size of an species decreases with increasing nuclear charge because the attraction for the electrons increases. Thus, $Al^{3 +}$ is smaller in size
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.