Within each pair elements F and Cl, S and Se and Li and Na, respectively, the elements that release more energy upon an electron gain are
Option: 1 Cl, Se and Na
Option: 2 Cl, S and Li
Option: 3 F, S and Li
Option: 4 F, Se and Na
From the given pairs, the more energy on gaining of an electron will be released by the following elements:
Cl, S, and Li
Therefore, Option(2) is correct.
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