Fe, Fe in the FeO , Fe in the Fe2O3, O in the MgO, Cl in the KCl, Na in the NaCl, Mg in the MgCl2, Al in the Al2O3, Ge in the GeCl4, Pb in the Pb metal,

F5 CHE 12.2 Oxidation states of the atom/ion in a compound (-1,-2,0,+1,+2,+3,+4)

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