•Oxizi: CaO, MgO, CuO , ZnO , SnO , FeO , HgO. ; •Baze : NaOH , Ca(OH)2 , CuOH, Mg(OH)2 , NH3 , AgOH , FeOH ; • Acizi : H2S, H2CO3 , HNO2 , HBr , H2S , H3PO3 , H3PO4 (poate avea doua valențe ) ; •Săruri : KCl , NaCl, CuCl2 , KBr , AuBr , SnF2 , FrCl.
