Electrons can exist independently, or in groups around the nucleus of an atom.
Experiments show that electrons in an atom may occur at a range of distances from the nucleus but are most likely to exist in certain low-energy orbits or shells, and within these shells there are further subshells, the configuration being such that no two electrons in any one atom have identical properties. An electron moves about the nucleus in a circular or elliptical orbit and also spins on its axis. A Dictionary of Earth Sciences 2. A Dictionary of Earth Sciences 3. All rights reserved.