How can you prove with an example that conversion of an ion to an atom is an oxidation process?

The conversion of an ion to an atom is typically a reduction process, as it involves gaining electrons. However, oxidation generally refers to the loss of electrons. For example, the conversion of Cu2+\text{Cu}^{2+} to Cu0\text{Cu}^0 by reduction involves the gain of electrons, not oxidation. To demonstrate oxidation, we would show an ion losing electrons.

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