There is no friction on the electrons orbiting the nucleus.

For example, hydrogen atoms have one electron orbiting the nucleus.

There is always an integer number of electrons orbiting the nucleus.

In the Bohr model of an atom, electrons orbit the nucleus.

This model showed that electrons orbit the nucleus in fixed circular orbits.

The electrons do not orbit the nucleus in the sense of a planet orbiting the sun, but instead exist as standing waves.

Atomic hydrogen is simple, consisting of one electron orbiting a single proton.

The electrons orbit the atoms in all materials.

A classical electron orbiting a nucleus experiences acceleration and should radiate.

However, this lack of interaction with electromagnetism would not allow electrons to orbit an atom nucleus.