# How many electrons are in the highest occupied energy level of a neutral chlorine atom?

There are seven electrons in the highest occupied energy level of a chlorine atom. These electrons occupy the $\text{s and p}$ sublevels, and make up the valence shell.
A chlorine atom has the atomic number 17, which means it has 17 protons in its nucleus. A neutral chlorine atom also has 17 electrons. The electron configuration for chlorine is ["Ne"]"3s"^2"3p"^5". The highest energy $\text{s and p}$ sublevels make up the valence shell.