Final answer:
The carbonate ligand CO₃²⁻ can coordinate to a metal center as a bidentate ligand.
Step-by-step explanation:
The carbonate ligand CO32- can coordinate to a metal center as a bidentate ligand. Bidentate ligands bind through two donor sites. In the case of CO32-, it can bind to a metal center through two oxygen atoms, each acting as a donor site by donating a lone pair of electrons.