Well, if Earth was the 'nucleus' of an atom, the radius of the electron cloud would depend on the energy of that atom, anything from the moon to Pluto.
Electron orbits are not like planets with an ecliptic, nor movements much like a stable orbit, just random movement that may compare to a shell around the nucleus or more like an atmosphere.
Electrons are sub atomic particles that don't behave like solid mater.
Even comparing to earth and other planets is hardly close.
Things really get complicated when you start talking molecules and electron bonding and sharing.
More food for thought,,an electric current is the flow of electrons in a conductor, each atom in turn, taking on an electron and passing an electron.