Within each pair of elements of
Question:

Within each pair of elements of $\mathrm{F}$ \& $\mathrm{Cl}, \mathrm{S} \& \mathrm{Se}$, and Li \& Na, respectively, the elements that release more energy upon an electron gain are-

  1. F, Se and $\mathrm{Na}$

  2. $\mathrm{F}, \mathrm{S}$ and $\mathrm{Li}$

  3. $\mathrm{Cl}, \mathrm{S}$ and $\mathrm{Li}$

  4. $\mathrm{Cl}, \mathrm{Se}$ and $\mathrm{Na}$


Correct Option: , 3

Solution:

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