Q. Which has the smallest size?
A) $Na^{+}$
B) $Mg^{2 +}$
C) $Al^{3 +}$
D) $P^{5 +}$
Explanation
(d)
As the nuclear charge per electron is maximum in $P^{5 +}$. Therefore, its size is smallest
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.