The Ajax model doesn’t group the elements into chemical families the way the current periodic table does. It is more accurate to begin thinking about grouping not so much on physical location or proximity, but more based on harmonics in relation to the platonic shells they reside in.
There is a correlation to the position of the nobles in each platonic shell and the fact that they have such a small radius. The interval is fairly regular.
1st shell – He, the first noble gas, in position 2 of 8.
2nd shell – Ne, in position 2 of 8.
3rd shell – Ar, in position 4 of 14.
4th shell – no noble gas in shell #4
5th shell – Kr, in position 7 of 32.
The inner shell of the Neon atom is “squashed by the 2 opposing proton / neutron pairs of the outer shell. This locks the inner shell to the outer, greatly reducing bonding capabilities of it, all all the noble gases.
There is a tight (small) radius on the nobles, almost like they “run out of harmonics” for bonding, for that given shell. The electrons, for example in He, are in direct opposition to each other, at 180 degrees.
For Ar, at 4 electrons in the 3rd shell, are symmetrically positioned equidistant from each other. That particular ratio, 4 out of a potential 14 vertices, is significant. Too “tight” to bond; like a guitar string tightened almost ready to snap.
Notice how the radius of each element following each noble jumps. After He, which is smallest, the next – Li, is a big jump (going from 2 to 3 vertices in its platonic shell). Ne to Na, (going from 2 to 3 vertices in its platonic shell). Ar to K (going from 4 to 5 in the platonic shell). Kr to Rb (going from 7 to 8 vertices in its platonic shell). Suddenly it’s like a loosened up guitar string with a bunch of bonding potential.