Write the resonance structures of $CO_3^{2-}$ and $HCO_3^{-}$.

(N/A) The resonance structures represent the delocalization of electrons within the ion.
$(a)$ For the carbonate ion $(CO_3^{2-})$,there are three equivalent resonance structures where the double bond is shared among the three oxygen atoms.
$(b)$ For the bicarbonate ion $(HCO_3^{-})$,there are two resonance structures where the double bond is shared between the carbon and the two non-protonated oxygen atoms.