Complex sentence: Redox ("red " uction -"ox" idation) reactions include all chemical reactions in which atoms have their oxidation state changed-that is, redox reactions are concerned with the transfer of electrons between species.
Split into simpler sentences: Redox ("red " uction -"ox" idation) reactions include all chemical reactions in which atoms have their oxidation state changed. Redox reactions are concerned with the transfer of electrons between species.