States formed by attachment of excess electrons to molecules or clusters can be broadly classified into valence and nonvalence states, but many of these states do have both, some valence and some nonvalence character. Here a new analysis scheme for this type of state is presented. It is based on considering the density of the excess electron as a function of the distance to the nearest atom, and this vantage point yields, in the first place, an intuitive picture akin to the well-known atomic radial distribution function, and, in the second place, a distance-from-the-atoms measure that is directly related to the nonvalence character of the excess electron. As a first test the analysis scheme is applied to the occupied orbitals of the water monomer, the water hexamer, and benzene, and its properties are contrasted to those of other frequently employed measures, such as the radius of gyration. Then its utility is demonstrated for three anions: CH3NO2–, which has both a valence and a nonvalence state, NaCl–, whose ground state has been classified as valence or nonvalence by different authors, and two conformations of the water hexamer anion, (H2O)6–, the so-called AA isomer, which supports a surface state, and a Kevan-like structure, which has served as a model for a cavity state.