Periodic Table of the Elements - Oxidation Numbers

Periodic Table of the Elements - Oxidation Numbers

This periodic table contains the oxidation numbers of the elements. Bold numbers represent the more common oxidation states. Values in italics represent theoretical or unconfirmed oxidation numbers.

This table also contains the element number, element symbol, element name and atomic weights of each element.

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About Oxidation Numbers

The oxidation number refers to the electrical charge of an atom. Typically, this relates to the number of electrons that must be gained (negative oxidation number) or lost (positive oxidation number) for the atom's valence electron shell to be filled or half-filled. However, most metals are capable of multiple oxidation states. For example, iron common has an oxidation number of +2 or +3. Halogens, on the other hand, have an oxidation state of -1.