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Learning oxidation-reduction reaction may abut a large number of obstacles. Beyond the fact that the concepts are numerous and unfamiliar to students alternative designs within the previous knowledge of these may affect their understanding of oxidation and reduction concepts. This work aims to explore the various obstacles and difficulties among Moroccan students on basic concepts (chemical reaction) that constitute an obstacle to the understanding and the basic concepts of the atomic model (ion, cation and anion), and used to interpret oxidation or reduction. redox couple and the balance equation. Studies conducted on this subject have shown in the majority of learners that there are many unresolved problems.
The originality of our educational study is that we have proposed for the first time a path between oxidation, reduction and the electronic structure of atoms, simple molecules to clarify the redox phenomenon and achieve an effective symbolization the balance equation in learners