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Ca(II) Cl(I) CaCl2 Cl-Ca-Cl chlorek wapnia
Li(I) O(II) Li2O Li-O-Li tlenek litu
Ca(II) S(II) CaS Ca=S siarczek wapnia
Pb(II) O(II) PbO Pb=O tlenek ołowiu(II)
Cr(VI) O(II) CrO3 --------- tlenek chromu(VI)
Fe(III) Br(I) FeBr3 ---------- bromek(I) żelaza(III)