Every concentration of matter or material nucleus produces mainly two types of energy and force fields: gravitational and magnetic (antagonistic and compensatory between them: action-reaction or concentration-expansion), which interact as a pair of forces that induce and they produce the rotation (spin) of these nuclei.
With this rotation, these force fields structure and build positive magnetic orbits, and gravitational shells.
Therefore in the atoms the positive charges are located in these orbits (planetary type)*, which is demonstrated by their behavior, since they always move on and along these orbits from where they are transferred or acquired, but never from orbits to nucleus, or vice versa.
Both positive magnetic orbits and gravitational layers (atomic valence layers) tend and need to be completed to form the architecture in equilibrium of forces, charges and spatial distribution.
Therefore, every atom tends to complete its active magnetic layers (with sufficient positive potential for orbital attraction) and also its gravitational valence layers, an issue that only occurs in noble gases, which are already balanced in their orbits and layers, and they do not need couplings with other atoms to complete their field balances.
The others, those that are not noble gases, need molecular coupling to fill both their magnetic orbits and their gravitational layers.
* Being circular or elliptical (planetary) orbits, they meet the forces and physical requirements of force balances: Action-reaction, centrifugal-centripetal, in addition to maintaining the electrons in their corresponding orbits due to the attraction of positive charges that these orbits have, that is, the electrons are forced to remain in them, unless another force or greater charge forces them to be transferred or exchanged to another orbits or gravitational layer.

Here is a drawing about some observation, proof or demonstration of the expansive forces in the Cosmos carried out by means of the magnetic fields.

PHYS. ORG MARCH 31, 2021
New study sows doubt about the composition of 70 percent of our universe
by University of Copenhagen
As Hansen puts it:
"Honestly, our discovery may just be a coincidence. But if it isn't, it is truly incredible. It would change our understanding of the universe's composition and why it is expanding.
As far as our current knowledge, our ideas about dark matter with a type of magnetic force and the idea about dark energy are equally wild. Only more detailed observations will determine which of these models is the more realistic. So, it will be incredibly exciting to retest our result."