One of the most ubiquitous is the «octet rule,» which states that each atom in a molecule that is produced by a chemical reaction will have eight
outer orbiting electrons.
Not exact matches
The large
orbit of the loosely bound
outer electron of cesium atoms would repel the negative charge of the helium atom — overcoming the van der Waals forces that normally help spread superfluid helium over a surface.
One of these
electrons, however, circles alone in an
outer orbit, far from the nucleus.