Oxidation
Oxidation Reaction according to the Classical Concept
Oxidation is Defined as, the addition of Oxygen or any other electronegative element to a substance.
Example,
2Mg(s) + O2(g) → 2MgO (addition of oxygen)
Mg(s) + Cl2(g) → MgCl2 (addition of electronegative element, chlorine)
Or
As the removal of Hydrogen or any other electropositive element from a substance.
Example,