However, it should be noted that in ionic compounds (such assodium chloride）The combination between ions does not depend onCovalent single bondYes, but byElectrostatic force。and,double bondNor can it be simply regarded as the combination of two single bonds.
Single bond has bond energy, bond length, bond angle and other attributes, which affect the stability of single bond.In general, the smaller the bond length, the greater the bond energy, and the more stable the single bond.We can also judge the stability of compounds by the stability of single bonds.In general, HF is more stable than HCl, because H-F bond has more energy than H-Cl bond,Shorter key length。[1]
