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  • Which of the following elements will gain one electron more readily in comparison to other elements of their group? (i) S (g) (ii) Na (g ) (iii) O (g) (iv) Cl (g)

Which of the following elements will gain one electron more readily in comparison to other elements of their group?

(i) S (g)

(ii) Na (g)

(iii) O (g)           

(iv) Cl (g)

Answers (1)

The answer is the option (i) and (iv)

Explanation: There are many elements where energy is released when an electron is added to the atom of those elements, thereby the electron gain enthalpy being negative for such elements. For example, the group 17 elements which are the halogens have extremely high negative electron gain enthalpies because they can attain stable noble gas electronic configurations by picking up an electron.

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