# How di I write the Lewis structure of magnesium chloride?

Jul 29, 2016

See below.

#### Explanation:

${\text{MgCl}}_{2}$ is an ionic compound.

The electron configuration of $\text{Mg}$ is $1 {s}^{2} 2 {s}^{2} 2 {p}^{6} 3 {s}^{2} 3 {p}^{6} 4 {s}^{2}$.

$\text{Mg}$ can get a noble gas ${s}^{2} {p}^{6}$ configuration by losing its two $4 s$ electrons and forming a magnesium ion, ${\text{Mg}}^{2 +}$.

The electron configuration of $\text{Cl}$ is $1 {s}^{2} 2 {s}^{2} 2 {p}^{6} 3 {s}^{2} 3 {p}^{5}$.

$\text{Cl}$ can get a noble gas ${s}^{2} {p}^{6}$ configuration by gaining an electron and forming a chloride ion, $\text{Cl"^"-}$.

The Lewis structure of ${\text{MgCl}}_{2}$ is therefore

The compound is held together by electrostatic attractions between the positively charged magnesium ion and the negatively charged chloride ions.