In a redox process, what happens to electrons?

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In redox reactions, electrons move between species. Electrons are not created or destroyed; they are transferred from the donor to the recipient. The donor becomes oxidized by losing electrons, while the recipient becomes reduced by gaining them, so the overall process is a transfer of electrons between reactants. In electrochemical contexts, these electrons can flow through an external circuit from the reducing agent to the oxidizing agent. They do not remain with the same atom, nor are they produced or annihilated, which is why the transfer description best fits the phenomenon.