Determine the type of chemical bond CO3, CH4, I2, HI, O2, Cl3, CH.

Between which atoms does this or that type of bond arise? An ionic bond occurs between metal and non-metal atoms, for example, in metal oxides, in salts. A covalent bond occurs between atoms of non-metals, such as halogen acids and complex gases. A covalent bond is non-polar if the substance consists of the same atoms (their electronegativity is equal), and polar, if they are different. A metallic type of bond occurs between metal atoms.
Based on this, CO3, CH4, CH, HI is a covalent polar bond, and I2, O2, Cl3 is a covalent non-polar bond.