• It predicts general property trends. However, it does not give good numerical predictions on bond strength and bond length.• It gives a good first approximation of the bond angles in molecules, but it cannot be used to determine the actual bond angle in a compound.• It cannot explain the concept of resonance.– It required the drawing of more than one Lewis dot structure.• It does not predict the correct magnetic behavior of molecules.– O2 is paramagnetic, yet its Lewis dot structure predicts it should be diamagnetic.