Question

Among halogens cl has the highest electron affinity. explain

Answer 1

Electron affinity or electron gain enthalpy is the amount of energy released when an extra electron is added to a neutral gaseous atom,converting it into a negative ion.

Negative electron affinity indicates that the energy is given out when an atom accepts an electron.

Hence,more negative is the electron affinity,more is the energy releasd when an electron is added to an atom.

As Chlorine gains an electron more easily as compared to other halogens,therefore the amount of energy released is maximum in case of chlorine.

Hence, electron affinity or electron gain enthalpy is the most for Chlorine among halogens.

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