The name’s the game: e-pit-helium. So basically helium, but the pit/nucleus is made of a localized standing waves in the electric field.

Usually protons and neutrons form the center of an atom, with the protons providing an attractive force that keeps the electrons in orbit. This charge does not need to come from protons to form an atom though, even if it usually does. In the case of epithelium, it’s a standing wave in the electrical field. This only works for smaller atoms, like helium, though.

I’m talking out my butt if that’s not clear by now.