Question

Why does oxidation occur?

Answer 1

One atom has a greater electronegativity than a second atom and draws the electron density closer to the the atom with the higher electronegativity

Explanation:

Oxidation occurs when an atom loses electron density to another atom. The atom with the lower electronegativity loses electron density to the atom with higher electronegativity.

The Oxidizing agent has a higher electronegativity draws the electron density closer to itself. This is what causes oxidation.