3oksidasjonstilstand

3oksidasjonstilstand, also known as oxidation state, is a measure of the degree of oxidation of an atom in a chemical compound. It is defined as the charge that an atom would have if all the bonds in the compound were completely ionic. The oxidation state is typically represented by a Roman numeral or a positive or negative integer.

The oxidation state of an element can vary depending on the compound it is in. For example, oxygen typically has an oxidation state of -2 in most compounds, but it can have an oxidation state of -1 in compounds like hydrogen peroxide (H2O2) and +2 in compounds like oxygen difluoride (OF2).

The concept of oxidation state is useful in understanding and predicting chemical reactions. For instance, the oxidation state of an element can change during a reaction, which can help to identify whether the element has been oxidized (lost electrons) or reduced (gained electrons).

The sum of the oxidation states of all atoms in a neutral compound is zero, and in a polyatomic ion, the sum of the oxidation states is equal to the charge of the ion. This is known as the oxidation state sum rule.