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The oxidation number is the possitive or negative charge an atom wouuld have if the compound was
composed by ions. every element on the Periodic table has an oxidation number. However, there are some elements that
have more than one oxidation numbers [ie: Ferrous] When writing a formula, ALWAYS place the element with the smallest oxidation
number in the front. Be careful! The sum of the oxidation numbers of all atoms in any formula must add up to ZERO (0)
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