The chemical reaction in which a reactant combines with oxygen or loses hydrogen to form a product is called oxidation reaction.
e.g. `{:((1)2Mg_((s))+O_(2(g))to 2MgO_((s))),("Magnesium" " ""Oxygen" " ""Magnesium oxide"):}`
`{:((2)2Cu_((s))+O_(2(g))to 2CuO_((s))),("Copper" " ""Oxygen" " ""Copper oxide"):}`
`{:((3) MgH_(2)to Mg_((s))+H_(2(g))),("Magnesium" " ""Magnesium" " ""Hydrogen"),("hydride"):}`
