Published by:
CGP EDU Academic Team
Published on: August 13, 2026
Which is not the correct order for the stated property?
A
; atomic radius B
; first ionization enthalpy C
I; electron affinity D
; electronegativity
Text Solution
Verified by ExpertsThe correct answer is:
B
On moving along a period, ionization enthalpy increases. Thus, the order of ionization enthalpy should be as follow: 
.But N has half-filled subshell, therefore, it is more stable than O, thats why its ionization enthalpy is higher than O. Thus, the correct order of IE is 
.
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