The largest element among $\mathrm{O}, \mathrm{Se}, \mathrm{S}, \mathrm{Te}$ is
The largest element among $\mathrm{O}, \mathrm{Se}, \mathrm{S}, \mathrm{Te}$ is
$\mathrm{S}$
$\mathrm{Se}$
$\mathrm{O}$
$\mathrm{Te}$
Solution
As we move down the group in the periodic table, atomic size increases due to increase in principle quantum number. Oxygen, selenium, sulphur and tellurium are belongs to same group of the periodic table. Thus, the largest element among them is Te. Hence, the correct option is (4).