How to find Oxidizatotion number of element

1.	How to find Oxidizatotion number of element
Answer» An oxidation number can be assigned to a given element or compound by following the following rules.\tAny free element has an oxidation number equal to zero.\tFor monoatomic ions, the oxidation number always has the same value as the net charge corresponding to the ion.\tThe hydrogen atom (H) exhibits an oxidation state of +1. However, when bonded with an element with less\xa0electronegativity\xa0than it, it exhibits an oxidation number of -1.\tOxygen has an oxidation of -2 in most of its compounds. However, in the case of peroxides, the oxidation number corresponding to oxygen is -1.\tAll alkali metals (group 1 elements) have an oxidation state of +1 in their compounds.\tAll alkaline earth metals (group 2 elements) exhibit an oxidation state of +2 in their compounds.\tIn the compounds made up of two elements, a halogen (group 17 elements) have an oxidation number of -1 assigned to them.\tIn the case of neutral compounds, the sum of all the oxidation numbers of the constituent atoms totals to zero.\tWhen polyatomic ions are considered, the sum of all the oxidation numbers of the atoms that constitute them equals the net charge of the polyatomic ion.Thus, the oxidation number of an atom in a given compound can be calculated with the steps mentioned above.

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