Atomic electonic structure started with Bohr's 2-D circle which was rotated to form a 3-D sphere. p, d, and f - orbitals were added as the physicists built on the base. Problems arose when chemists started modeling compounds; even the simplest. Tetrahedral orbitals were needed; so to keep the atomic modelers happy, orbitals were "hybridized". Repulsion between paired electrons continued to be waived. There was NO LOOKING back to see if the spherical base model needed to be modified. Now there is a DIFFERENT model (called the MCAS model). This model starts with a tetrahedral base orbital with ONE electron (hydrogen). This tetrahedral orbital is opposed by another with ONE electron (He). e-e repulsion is NOT waived in the model. Bonds are not formed by waiving e-e repulsion - they are formed by e-p attractions. This models OBEYS classical physics and is amenable to standard orbital approaches without the need to waive e-e repulsions. Waiving e-e repulsion to satify the math is ILLOGICAL. Not evaluating models that do not waive them is scientifically irresponsible. See (www) swcp.com/~jmw-mcw/ for further verbage.