Electron loss; associated with an increase in oxidation number.

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Multiple Choice

Electron loss; associated with an increase in oxidation number.

Explanation:
Oxidation is the process of electron loss, which increases the oxidation number of the species. When an atom or ion loses electrons, its oxidation state rises because you are removing negative charge. For example, Fe2+ losing an electron becomes Fe3+, going from +2 to +3. In electrochemical contexts, oxidation typically occurs at the anode, while the opposite process, reduction, occurs at the cathode. The terms anode and cathode name the electrode locations, not the process itself, and reduction is the gain of electrons with a decrease in oxidation number.

Oxidation is the process of electron loss, which increases the oxidation number of the species. When an atom or ion loses electrons, its oxidation state rises because you are removing negative charge. For example, Fe2+ losing an electron becomes Fe3+, going from +2 to +3. In electrochemical contexts, oxidation typically occurs at the anode, while the opposite process, reduction, occurs at the cathode. The terms anode and cathode name the electrode locations, not the process itself, and reduction is the gain of electrons with a decrease in oxidation number.

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