Final answer:
The correct name-formula combination for iron is Fe - Iron. Iron can form two cations, Fe²+ and Fe³+, with different charges. The correct way to name these compounds is by using the Stock system, where the oxidation state is indicated as a Roman numeral in parentheses following the element name.
Step-by-step explanation:
The correct name-formula combination for iron is Fe - Iron. When naming an ionic compound containing iron, it is necessary to indicate the oxidation state of the iron ion. Iron can form two cations, Fe²+ and Fe³+, with different charges.
The correct way to name these compounds is by using the Stock system, where the oxidation state is indicated as a Roman numeral in parentheses following the element name. For example, FeCl₂ is iron(II) chloride and Fe₂O₃ is iron(III) oxide.