What does an atom gain or lose in an oxidation-reduction reaction?

a.
protons
b.
oxygen
c.
neutrons
d.
electrons

electrons

Explanation:

Oxidation is the loss of electrons during a reaction by a molecules, atom or ion. Oxidation occurs when the oxidation state a molecule, atom or ion is increased. The opposite process is called reduction , which occurs when there is a gain of electrons or the oxidation state of an atom, molecule, or ion decreases

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