What types of chemical bonds exist in the following substances LiI N2 BaCl2 CH4.

LiI – ionic (a strong chemical bond resulting from the electrostatic attraction of cations and anions – formed between atoms with a large electronegativity difference, in which the common electron pair passes mainly to an atom with a greater electronegativity). N2 – covalent non-polar (can be formed between two identical atoms). BaCl2 – ionic, CH4 – covalent polar (carried out due to the electron pair belonging to both atoms. Formed between the atoms of non-metals).