The first ionization enthalpies of Nitrogen () and Oxygen () are and respectively. Which of the following correctly describes their second ionization enthalpies ()?

Question

The first ionization enthalpies of Nitrogen ($N$) and Oxygen ($O$) are $14.0 	ext{ eV}$ and $13.6 	ext{ eV}$ respectively. Which of the following correctly describes their second ionization enthalpies ($IE_2$)?

Prashant Kotian · Accepted Answer

Correct answer: B. because N has a stable half-filled configuration. However, after losing one electron, becomes (highly stable), while becomes . Thus, is strictly greater than .

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