Which statements describe what happens in a redox reaction? Check all that apply. A. Electrons move from one substance to another. B. One atom gains electrons and one loses electrons. C. The cations on two substances trade places. D. There are two oxidation reactions.

A redox reaction is a reaction that involves both reduction and oxidation, it involves a reducing agent which looses electrons and undergoes oxidation and an oxidizing agent that gains electrons (reduction). I believe the following are true about redox reactions; Electrons move from one substance to another, One atom gains electrons and one looses electrons.