Q. Among the following options, the correct trend in the electron gain enthalpy is
A) I > Br > Cl > F
B) F > Cl > Br > I
C) Br > Cl > F > I
D) Cl > F > Br > I
Explanation
[Solution from source] Chlorine has the most negative electron gain enthalpy of the halogens; fluorine's is less negative because the added electron enters the compact 2p shell with strong repulsion. After Cl the values become less negative down the group: Cl > F > Br > I (in magnitude). Answer (4).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.