electron gain enthalpy of chlorine is more than that of flourine

Asked by krishna015 | 20th Feb, 2011, 09:08: PM

Expert Answer:

Dear Student
 
The size of fluorine atom is small. As a result, there are strong electron-electron repulsions in the compact 2p-orbital. Thus, the electron gain enthalpy of fluorine is less negative than that of chlorine.
 
 
The p orbital is slightly higher in energy than the s orbital. So, it's easier to remove the 2p1 elecrtron from B, therefore the 1st ionisation energy in B will be lower.
 
We hope that clarifies your query.
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Answered by  | 20th Feb, 2011, 09:59: PM

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