Q. The ionic radii of ioselectronic species $N^{3 -},O^{2 -}and\ F^{-}$are in the order?
A) 1.36, 1.40, 1.71
B) 1.36, 1.71, 1.40
C) 1.71, 1.40, 1.36
D) 1.71, 1.36, 1.40
Explanation
(c)
The size of isoelectronic species decreases with increasing nuclear charge. Hence, the order of ionic radii of $N^{3},O^{2}$and F is as
$N^{3}\ \ \ \ \ \ > \ \ \ \ O^{2}\ \ > \ \ \ \ \ \ F$l
1.71 1.40 1.36
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.