A carbon atom can form a single covalent bond with most basic element, that is to say, most of the ones on the extreme right and left sides of the Periodic Table. Carbon can bond with: - Itself (C) - Potassium (K) - Chlorine (Cl) - Nitrogen (N) *NOTE* Although this CAN form a single bond, it most likely will result in a double or triple bond - Oxygen ( O, Ditto Nitrogen) - Hydrogen (H, Ditto Nitrogen and Oxygen)