Published by:
CGP EDU Academic Team
Published on: August 12, 2026
The correct order of ionic radii for the ions S 2- , Cl - , P 3- , 
is
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
D
(15) 
, (16) 
, belong to 
period whereas (20) 
belong to 
period.
These are isoelectronic ions and therefore size, depends on nuclear charge. More is the nuclear charge, smaller is the size. Also, size of cation is always smaller than anion. Hence, the correct order is as shown by option .
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