What has research determined about the orbit of an electron around a nucleus?
Electrons orbit and remain with in specific energy rings.
Electrons orbit the nucleus in circular motions exactly as shown on the classic Bohr model.
Each sub-level electron type has a unique path where it will likely be found.
Electrons orbit in exact energy levels.
I think the correct answer from the choices listed above is the second option. The research that determined about the orbit of an electron around a nucleus would be that electrons orbit the nucleus in circular motions exactly as shown on the classic Bohr model.