If several atoms interact, is often a redistribution of electrons between the reactants. It creates a more favorable energy of the whole situation, in which the atoms can be bound together.
As an elementary basic rule for the redistribution of electrons is treated as above, the Oktettregel, after which the elements in the noble reactions electron configuration aspire.



Thus, the following basic types of chemical bonds differ:

Ionic Bond, Covalent Bond, Metal Binding