Chemical bond is an attraction b/w atom that allows the formation or generation of chemical substances which contain two or more atoms. The bond is caused by the electromagnetic force attraction b/w opposite charges, either between nuclei and electrons, or as the result of a dipole attraction. The chemical bonds strength varies considerably; there are "strong bonds" such as ionic bond... https://www.expertsmind.com/chemistry/chemical-bonding-homework-assignment-help.aspx