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Oxidation Number

Last updated

Feb 28, 2022
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- Oxidation
- Oxidation-Reduction Reaction

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The oxidation number or oxidation state of an atom in a molecule or a polyatomic ion is the charge it would bear if all its bonds to unlike atoms were ionic bonds.

eg. 1: Methane

There are no bonds connecting like atoms in the methane molecule.
electronegativity: C > H

eg. 2: Acetaldehyde

There is one bond connecting like atoms in the acetaldehyde molecule, the carbon-carbon bond.
electronegativity: O > C > H

eg. 3: Nitric acid

There are no bonds connecting like atoms in the nitric acid molecule.
electronegativity: O > N > H

eg. 4: Periodate ion

There are no bonds connecting like atoms in the periodate ion.
electronegativity: O > I

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