Ammonium carbonate, $$(NH_4)_2CO_3$$, contains both ionic and covalent bonds.

- The bond between the ammonium ion, $NH_4^+$, and the carbonate ion, $CO_3^{2-}$, is an ionic bond, which is formed by the attraction between oppositely charged ions.

- The bonds between the carbon atom and the oxygen atoms in the carbonate ion are covalent bonds, which are formed by the sharing of electrons between atoms.