Chemical Bonding is the force between atoms that keeps them together in molecules. When two or more atoms are close enough, there may be an attractive force between the electrons of individual atoms and the core of one or more other atoms. If this force is large enough to hold together the atoms are said to have formed a chemical bond. All chemical bonds result from the simultaneous attraction of one or more electrons by more than one nucleus.
Chemical Bonding: Three Different Kinds of Strengths