The largest element among $O$,$Se$,$S$,and $Te$ is:

In case of isoelectronic species,the size of $F^{-}$,$Ne$,and $Na^{+}$ is affected by:

Among the ions $Mg^{2+}, O^{2-}, Al^{3+}, F^{-}, Na^{+}$ and $N^{3-}$,the ion with largest size and ion with smallest size are respectively

The correct sequence which shows the decreasing order of the ionic radii of the elements is:

From the given set of species,point out the species from each set having the least atomic/ionic radius:
$(A)$ $F^{-}, Na^{+}, Mg^{+2}$
$(B)$ $Ni, Cu, Zn$
$(C)$ $N^{-3}, Cs^{+}, H^{-}$
$(D)$ $Li, Li^{+}, Be^{+2}$

Which of the following is arranged in decreasing order of size?