RULES FOR CALCULATOR THE OXIDATION numbers
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Rules for assigning oxidation numbers
The oxidation number of a free element is always 0. The oxidation number of a monatomic ion equals the charge of the ion. Fluorine in compounds is always assigned an oxidation number of -1. The alkali metals (group I) always have an oxidation number of +1.
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Comparison between the electronegativities of two combining atoms is not an easy task in case of polyatomic molecules. That's why a set of rules has been given to calculate the oxidation number of an element in a given compound or ion. These rules are given below.
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