# What is the Stock system name for the compound FeO?

Jul 1, 2017

Iron(II) oxide

#### Explanation:

The stock name for a transition metal ionic compound basically means you write the name of the metal followed by its oxidation state in parentheses (which is then followed by the anion name).

An important thing to know is that in most all compounds, oxygen has an oxidation state of color(red)(2^-.

Since this compound is electrically neutral, the sum of the oxidation states must equal $0$. We have known so far

${\overbrace{\text{Fe")^"?"overbrace("O}}}^{2 -}$

As you may see, the oxidation state of iron in this compound must be color(blue)(2+ so that they sum to $0$:

The stock name of this compound is thus

sfcolor(green)("iron(II) oxide"

This video discusses additional examples of how to use the stock system for naming compounds.