Nitrogen forms a nitride ion with the formula $\text{N}^{3-}$. Which particle has an electronic configuration that is not the same as that of the nitride ion?
- A$\text{Al}^{3+}$
- B$\text{Cl}^-$
- C$\text{Na}^+$
- D$\text{O}^{2-}$
Chemistry 0620 · IGCSE · Ions and ionic bonds