Estados de Oxidación o Números de Oxidación

In this video, I explain how to assign oxidation numbers to a compound. 0:42 - Definition of Oxidation State. 1:04 - The oxidation state for free elements is 0. 1:55 - The oxidation state of H = +1 and O = -2 (in most compounds). 3:12 - The algebraic sum of the oxidation states in a neutral molecule is always 0, while in a polyatomic ion it is equal to the ion's charge. Auxiliary Rules 11:15 - Elements of Group I and II