Published by:
CGP EDU Academic Team
Published on: August 13, 2026
In which one of the following pairs, the radius of the second species is greater than that of the first?
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
B
and 
both are isoelectronic but differ in the charge possessed by them. As the negative charge increases, the electrons are held less and less tightly by the nucleus, therefore ionic radii increase. Hence, ionic radii of 
is greater than 
.
In a period from left to right, atomic radii decreases but in a group on moving downwards it increases.
Prepare Smarter with CGP Edu
Get practice questions, solutions, and test series in one place.
Write a Review
Share your experience with this question and solution.
Commentary
Send your comment, doubt, correction, or feedback to admin.
Similar Questions
Explore conceptually related problems
The radii of the and are in the order:
Which of the following is not correct for iso-electronic ions?
Which of the following isoelectronic ions has lowest ionisation enthalpy?
The elements which occupy the peaks of ionisation enthalpy curve are
Which out of the following has the largest ionisation enthalpy?
Which of the process requires largest energy among them?