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CGP EDU Academic Team
Published on: August 14, 2026
The correct order of electron gain enthalpy (most endothermic first and most exothermic last) is
Text Solution
Verified by ExpertsThe correct answer is:
B
Be and N has 1s 2 2s 2 and 1s 2 2s 2 2p 3 stable configurations respectively. So addition of extra electron is difficult in their valence shell. The atomic size of C is smaller than B and also C has higher nuclear charge; so addition of electron will be easier in C than B.
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