| The electronegativity is lower for a given oxidation state in an anion than it is in a neutral molecule. |
| Although the most common anion formed by oxygen is monatomic, oxygen can also form diatomic ions known as peroxides and superoxides. |
| The ion selective permeability of the rust composition component showed the anion permeability of the rust film. |
| The superoxide anion radical is capable of causing as much cellular damage as singlet oxygen. |
| Superoxide anion was estimated by spectrophotometric measurement of the reduction of nitro blue tetrazolium. |
| The transfer of one electron from an electron donor to an excited state of hypericin generates its corresponding semiquinone radical anion. |
