Published by:
CGP EDU Academic Team
Published on: August 13, 2026
The ions 
are isoelectronic. Their ionic radii show
A
a decrease from 
to 
and then increase from 
to 
.
to and then increase from to . B
an increase from 
to 
and then decrease from 
to 
.
to and then decrease from to . C
a significant decrease from 
to 
to D
a significant increase from 
to 
to
Text Solution
Verified by ExpertsThe correct answer is:
C
For isoelectronic species, the ionic radii decrease with increase in nuclear charge.
So, the cation with greater positive charge i.e. 
will have smaller radius and the anion with greater negative charge i.e. 
will have a larger radius.
Ionic radii : 
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