Order of electron affinity of $F, C l, B r$ and $I$ is...

F < C l > B r > I

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F > C l > B r > I

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F < C l < B r < I

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F > C l < B r > I

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Solution

The correct option is A $F < C l > B r > I$
Down the group electron affinity decreases due to increase in atomic radii. Here is an exception fluorine has low electron affinity than chlorine. This is because due to smaller size of fluorine and electrons are more closely bound together so that incoming electron feels repulsion so additional energy is required to hold the incoming electron. That's why fluorine has smaller electron affinity.

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Similar questions

Among halogens, the correct order of amount of energy released in electron gain (electron gain enthalpy ) is
(a) F > Cl > Br > I (b) F < Cl < Br < I (c) F < Cl > Br > I (d) F < Cl < Br < I

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Order of electron affinity of F,Cl,Br and I is...

Order of electron affinity of $F, C l, B r$ and $I$ is...