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Oxidation Numbers: Rules

Oxidation Numbers: Rules 1) The Oxidation number of the atoms in any free, uncombined element, is zero 2) The sum of the Oxidation numbers of all atoms in a compound is zero 3) The sum of the Oxidation numbers of all atoms in an ion is equal to the charge of the ion 4) The Oxidation number of fluorine in all its compounds is 1. 5) The Oxidation number of other halogens in their compounds is usually 1. 1. Oxidation Numbers: Rules 6) The Oxidation number of hydrogen is +1. when it is combined with more electronegative elements (most nonmetals). and 1 when it is combined with more electropositive elements (metals). 7) The Oxidation number of Group 1A elements is always +1 and the Oxidation number of Group 2A elements is always +2.

1 Oxidation Numbers: Rules 1) The oxidation number of the atoms in any free, uncombined element, is zero 2) The sum of the oxidation numbers of all atoms

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