The Key Event Movement of Electrons Between Reactants

In oxidation-reduction (or redox) reactions, the key chemical event is the net 

During the formation of a covalent compound from its elements, there is again a net movement of electrons, but it is more of a shift in electron charge than a full transfer. Thus, ions do not form. Consider the formation of HCl gas  

Animation Oxidation-Reduction Reactions Online Learning Center 

CHAPTER 4 Tlie Major Classes of Chemical Reactions 

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