Identify the oxidized substance, the reduced substance, the oxidizing agent, and the reducing agent in the redox reaction. mg (s) + cl2 (g) ⟶mg2 + (aq) + 2cl - (aq)

An oxidation-reduction reaction is a reaction in which oxidation numbers change. Oxidation involves the loss of electrons while reduction is the gain of electrons. In the reaction above; Chlorine undergoes reduction, and is therefore, the oxidizing agent, while Mg undergoes oxidation and is therefore the reducing agent.