# What is the correct name for MgF_2?

Mar 8, 2016

Magnesium (II) fluoride or simply magnesium fluoride

#### Explanation:

Simple salts such as this (that is, those with only cation (positively charged species) and one anion (negatively charged species)) have the nomenclature given by

$M \setminus e \setminus t \setminus a l$ $\left(c h a r \setminus g \setminus e\right)$ $a n i o n$

We know from the compound given that the metal is magnesium, the anion is fluoride and that the charge of the metal is

$M g {F}_{2} \rightarrow M {g}^{+ 2} + 2 {F}^{-}$

two, or II, so we can build the name to be

Magnesium (II) fluoride.

But since magnesium is usually either found as a metal (charge 0) or as a salt in charge (II), we can omit the charge, so saying

Magnesium fluoride

Isn't wrong.