What is the Stock system name for the compound FeO?

1 Answer

Iron(II) oxide


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


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.