Oxidation: The Definition

Oxidation is a fundamental chemical process defined as the loss of electrons by a substance (atom, molecule, or ion).

This loss of electrons typically leads to an increase in the oxidation state of the chemical species involved.

A common mnemonic to remember this is OIL RIG, where 'Oxidation Is Loss' of electrons.

Analyzing the Options

• 1. Loss of electrons: This aligns directly with the chemical definition of oxidation.
• 2. Loss of protons: This is incorrect. Proton loss relates to acidity (Bronsted-Lowry theory) but not oxidation.
• 3. Gain of electrons: This is the definition of reduction, the opposite process of oxidation.
• 4. Gain of neutrons: This relates to nuclear reactions (like isotope formation) and is not the definition of oxidation.

Therefore, the correct definition of oxidation is the loss of electrons.