In studying the span from insulator to conductor, physicists look at the energy gap, the difference between the highest filled electron energy level and the next available energy level, a level at which the electron is free to flow as part of an electrical current.
(physicists; look; at the energy gap; L:In studying the span from insulator to conductor) (the electron; is; free to flow as part of an electrical current; L:a level) (the electron; to flow; as part of an electrical current)
physicists the electron the electron
look is to flow
at the energy gap L:In studying the span from insulator to conductor
free to flow as part of an electrical current L:a level
as part of an electrical current