Published by:
CGP EDU Academic Team
Published on: August 11, 2026
In which of the following, elements are correctly arranged in the decreasing order of their second ionization enthalpies.
A
O 
F 
C
F C
B
N 
O 
F 
C
O F C C
D
C 
N 
O 
F
N O F
Text Solution
Verified by ExpertsThe correct answer is:
A
All elements are in 1st Period. As the atomic number increases ionization energy increases.
Oxygen gets extra stability due to half-filled p-orbital after first ionization.
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