Active metals often form a protective oxide surface film that prevents further reaction of the metal with oxygen in the air. Which one of the following formulas for the metal oxide is not correct?
A) Al2O3 is aluminum(III) oxide.
B) Fe2O3 is iron(III) oxide.
C) Na2O is sodium oxide.
D) MgO2 is magnesium oxide.
E) FeO is iron(II) oxide.
Correct Answer:
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