Na2O Na(1)O(2)
CaCl2 Ca(2)Cl(1)
FeO Fe(2)O(2)
Fe2O3 Fe(3)O(2)
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Na2O Na(1)O(2)
CaCl2 Ca(2)Cl(1)
FeO Fe(2)O(2)
Fe2O3 Fe(3)O(2)