4/11/2016. There's no way I would ever rate a box store 5 stars, but I do like our Home Depot. The service isn't always the greatest, but it's usually pretty decent. The have a wide selection and the prices are generally the best in town.
Electrons with the highest energy levels exist in the outermost shell of an atom and are relatively loosely bound to the atom. This outermost shell is known as the valance shell and electrons in this shell are called valance electrons. A completed outermost shell has valance of zero.
Key Concepts. 1  The electrons surrounding an atom are located in regions around the nucleus called âenergy levelsâ. 2  An energy level represents the 3-dimensional space surrounding the nucleus where electrons are most likely to be. 3  The first energy level is closest to the nucleus.