This is particularly true of high oxidation states, where the ionization energy required to produce a multiply positive ion is far greater than the energies available in chemical reactions. The oxidation state of an atom does not represent the "real" formal charge on that atom, or any other actual atomic property.
While fully ionic bonds are not found in nature, many bonds exhibit strong ionicity, making oxidation state a useful predictor of charge. Conceptually, the oxidation state may be positive, negative or zero. It describes the degree of oxidation (loss of electrons) of an atom in a chemical compound. The oxidation state, or oxidation number, is the hypothetical charge of an atom if all of its bonds to different atoms were fully ionic. Number that describes the degree of oxidation of an atom in a chemical compound the hypothetical charge that an atom would have if all bonds to atoms of different elements were fully ionic
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