Elemental copper (Cu) --metallic bond Nitrogen gas (N2)--- covalent bond Na+ dissolved in water = dipole interaction Antarcticite (CaCl2 6H2O)==coordination bond Solution Elemental copper (Cu) --metallic bond Nitrogen gas (N2)--- covalent bond Na+ dissolved in water = dipole interaction Antarcticite (CaCl2 6H2O)==coordination bond.