How to Make Iron Oxide Formula?

The formula for Iron (II) oxide, also known as ferrous oxide, is FeO.

Here's a breakdown of how to determine the formula:

• Iron (II) implies a +2 charge on the iron ion (Fe²⁺). The Roman numeral II indicates the oxidation state of the iron.
• Oxide implies a -2 charge on the oxygen ion (O^2-).
• To form a neutral compound, the charges must balance. In this case, Fe²⁺ and O^2- combine in a 1:1 ratio because +2 and -2 add up to zero.

Therefore, the formula is simply FeO, representing one iron(II) ion and one oxide ion.