# What does the ending -ide mean in the name of an ionic compound?

Jan 12, 2018

The ending -ide on the name of an ion means that it is a negatively charged ion, or anion.

#### Explanation:

It means that it is a negatively charged ion, called an anion.

$\text{NaF}$ is sodium fluoride with $\text{F"^(-)}$ as the anion.

$\text{MgO}$ is magnesium oxide with $\text{O"^(2-)}$ as the anion.

${\text{CaCl}}_{2}$ is calcium chloride with ${\text{Cl}}^{-}$ as the anion.

$\text{Mg"_3"N"_2}$ is magnesium nitride with ${\text{N}}^{3 -}$ as the anion.