Question

Highest electron affinity is shown by Options O-, F-, F, N​

Answer 1

Explanation: Molecules of F₂, Cl₂ and anion F⁻, all have stable inert has configuration. Thus, their elctrn affinity is almost zero. Hence, among the given, O⁻ has the highest elctrn affinity.

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Answer 2

Answer:

O

Explanation:

Energy is released when an electron is added to the atom. Hence 1st electron affinity (EA  

) is always taken as negative. The addition of second electron to the negativity charged ions is opposed by Coulombic repulsion, hence energy has to be supplied for the addition of second electron. Hence (EA  

) is taken as positive.  

Addition of an electron to F  

 and O  

 ions will involve repulsions, hence their (EA  

) will b positive.

Due to stable fully filled configuration of Na  

) it has lower value of electron affinity than O. Hence O has highest electron affinity.

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