Up to now, an environment-dependent description of the atomic electronegativity χ A is defined, which can be learned from data. It remains to specify the non-classical contribution to the atomic hardness η A and the atomic radius α A for each element. Herein, we choose these by very simple heuristics: α A is set to be proportional to the original QEq radius of the element in question. These radii are tabulated for all elements up to Lawrencium (Z=103). Empirically, we found that scaling these radii with single global scaling parameter s at = 0.75 yields satisfactory results. Similarly, the non-classical hardness parameter η A is set to zero throughout, as we found that this yields robust models while keeping the empiricism of the method as low as possible. These choices are quite simplistic and further optimization would certainly be possible. As shown below, already these simple defaults provide highly accurate results for the investigated systems though.