Question:medium
The correct decreasing order of the first ionization enthalpies among the elements C, N, O, F is
The correct decreasing order of the first ionization enthalpies among the elements C, N, O, F is
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Standard Periodic Trend: IE increases left to right.
Exception: Be \(>\) B (full \(s\) shell) and N \(>\) O (half-filled \(p\) shell). Always look for these two anomalies in second-period enthalpy questions.
Exception: Be \(>\) B (full \(s\) shell) and N \(>\) O (half-filled \(p\) shell). Always look for these two anomalies in second-period enthalpy questions.
Updated On: Jun 24, 2026
- N \(>\) O \(>\) F \(>\) C
- O \(>\) F \(>\) N \(>\) C
- C \(>\) N \(>\) O \(>\) F
- F \(>\) N \(>\) O \(>\) C
Show Solution
The Correct Option is D
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