Identify the set of isoelectronic species

The phrase "equal electric" or "equal charge" refers to two atoms, ions, or molecules that have the same electronic structure and the same amount of valence electrons. Chemical species that are isoelectronic frequently exhibit identical chemical traits.

Each of the elements $\mathrm{N}{3}^{-}, \mathrm{O}{2}^{-}$, and ${\mathrm{F}}^{-}$ has 10 electrons. They are therefore isoelectronic.