We remind that atoms defined from topological analysis of materials are not spherical, nor overlapping. A feature of our method (also apparent in molecules ) is a that it often -not always -portray chemical bonds as less polar or ionic compared to QTAIM. Polarity is reflected in terms of atomic size in Table , where bonded electron energy basins are consistently more alike, compared to QTAIM. Noticeably, GaN is predicted to consist of atoms of nearly identical dimensions. The formally reduced atoms in urea (O and N) also calculate as similar in size. To explain why, we look next to quantifications of the number of electrons in each electron energy basin -the partial charges of the bonded atoms.