Published by:
CGP EDU Academic Team
Published on: August 14, 2026
Which of the following is the correct order for the size of C, N, P, S?
A
N 
C 
P 
S
C P S
B
C 
N 
S 
P
N S P
C
C 
N 
P 
S
N P S
D
N 
C 
S 
P
C S P
Text Solution
Verified by ExpertsThe correct answer is:
D
and 
are of 2 nd period element. Size decreases from 
to 
. Therefore, size of 
.
and 
are of 
period elements. But size of 
[opposite to the expected trend, i.e.,size of 
].
Because 
has half-filled stable configuration.
Increase of one electrons in 
causes repulsion between paired electrons ( 
) and thus size of 
is slightly increases from 
to 
.
Moreover, size of 
period elements is greater than that of 
period.
Hence the correct order of sizes is
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