The basis of the vsepr model of molecular bonding is the basis of the vsepr model of molecular bonding is electron domains in the valence shell of an atom will arrange themselves so as to minimize repulsions atomic orbitals of the bonding atoms must overlap for a bond to form regions of electron density on an atom will organize themselves so as to maximize s-character hybrid orbitals will form as necessary to, as closely as possible, achieve spherical symmetry regions of electron density in the valence shell of an atom will arrange themselves so as to maximize overlap