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-
F, Se and $\mathrm{Na}$
$\mathrm{F}, \mathrm{S}$ and $\mathrm{Li}$
$\mathrm{Cl}, \mathrm{S}$ and $\mathrm{Li}$
$\mathrm{Cl}, \mathrm{Se}$ and $\mathrm{Na}$
Correct Option: , 3
Solution:
