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# What is the trend for Electron Affinity?

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## Electron affinityThe amount of energy released when an electron is added to a neutral atom to form an anion is called electron affinity.Trend for electron affinityGenerally, on going down the group, electron affinity decreases because of the increase in the size of the atoms.Generally, ongoing left to right, the value of electron affinity increases because of increased nuclear attraction.Example of the electron affinity of halogenThe correct order of electron affinity is $\mathrm{Cl}>\mathrm{F}>\mathrm{Br}$.The electron affinity of fluorine is less than chlorine because the size of fluorine is too small whereas chlorine has a larger size to accommodate electrons.

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