# What is the ground state configuration of chlorine?

May 7, 2014

The ground state configuration of the neutral chlorine atom is $1 {s}^{2} 2 {s}^{2} 2 {p}^{6} 3 {s}^{2} 3 {p}^{5}$

The ground state is the most stable energy state for the electrons of a given atom

A neutral chlorine atom has 17 protons (atomic number 17) and 17 electrons.

The first two electrons are located in the 1s orbital.

In the second energy level, two electrons are located in the 2s orbital, and six electrons in the three 2 p orbitals.

The last 7 electrons, the outermost electrons with the highest energy levels, are located in the third energy level.

Two electrons are found in the 3s orbital and the last five electrons in the 3 p orbitals.