Oxidation as Loss of Electrons Steps:

• Identify the process: Magnesium atoms (Mg) become magnesium ions (Mg²⁺) by losing 2 electrons.
• Recall definitions: Oxidation is loss of electrons (OIL RIG); reduction is gain of electrons.
• Apply to Mg: Loss of electrons means oxidation occurs.
• Match to options: Select the statement that correctly identifies oxidation due to electron loss.

Why A is correct:

• Oxidation is defined as loss of electrons, which matches Mg → Mg²⁺ + 2e⁻.

Why the others are wrong:

• B: Reduction involves gain, not loss, of electrons.
• C: Reduction requires electron gain, but Mg loses electrons.
• D: Oxidation involves loss, not gain, of electrons.

Final answer: A