# What is the ground-state electron configuration of a neutral atom of chloride?

Mar 29, 2018

$1 {s}^{2} 2 {s}^{2} 2 {p}^{6} 3 {s}^{2} 3 {p}^{5}$

#### Explanation:

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 $1 s$ orbital.

In the second energy level, two electrons are located in the $2 s$ orbital, and six electrons in the three $2 p$ sub-orbitals. (${p}_{x} , {p}_{y} , {p}_{z}$).

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 $3 s$ orbital and the last five electrons in the $3 p$ sub-orbitals.

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