1.

Explainwhy theelectron gain enthalpy of thefluorineis lessnegativethan that of chlorine

Answer»

Solution :In F, thenewelectronto beaddedgoes to2p- subshellwhile in C1,it goesto 3p-subshell. Since 2P- subshellin muchsmallerthat 3p-subshellthereforethe addedelectronin F experiences muchstronger REPULSIONS from otherelectronin COMPARISION tothat in C1inotherwordsF does not accepttheincoming electron a electronwith that ease withwhich C1accepts . consequently the electrongainenthalpyof F isless negative THANTHAT of C1


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