Statistical push from above and pull from below.

Statistical push of electrons tending to escape overwhelmed by the geometry of imbalanced charge and the push of returning electrons.

That is to say an object at the surface of the earth will tend to get pulled into the earth because there will be a tendency for a slight imbalance between electrons and protons at the center of the Earth. This imbalance between the number of electrons and protons that fit in the orbitals that would ideally be explained by a chemistry teacher is responsible for a push-pull whose net effect is gravity. The Earth could actually be any sphere of any size. There will be a deficit of electrons at the center of the sphere and a surplus of electrons outside the center of the sphere. In between the center and the periphery we experience gravity.

The electrons at the top of the sphere will have a tendency to launch themselves out into space. After being launched the electron will be attracted by the charge imbalance and will want to return back to earth.

Statistically the object on the surface of the Earth will experience a weak force at the top due to electron return. The bottom of the object will have a net negative charge and be attracted to the imbalance between the electrons tending outwards and the protons which stand still.