Question:
Which one of the following arrangements represents the correct order of electron gain enthalpy (with negative sign) of the given atomic species?
Which one of the following arrangements represents the correct order of electron gain enthalpy (with negative sign) of the given atomic species?
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Small atomic size increases electron–electron repulsion, reducing electron gain enthalpy.
Updated On: Mar 24, 2026
- S < O < Cl < F
- Cl < F < S < O
- F < Cl < O < S
- O < S < F < Cl
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The Correct Option is D
Solution and Explanation
Step 1: Electron gain enthalpy becomes more negative across a period.
Step 2: Due to small size, oxygen and fluorine have less negative values than expected.
Step 3: Correct order (most negative last): \[ \text{O} < \text{S} < \text{F} < \text{Cl} \]
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