12
copper,cuprous,cupric,Cu,1,2
mercury,mercurous,mercuric,Hg,1,2
iron,ferrous,ferric,Fe,2,3
carbon,carbonous,carbonic,C,2,4
manganese,manganous,manganic,Mn,2,4
tin,stannous,stannic,Sn,2,4
lead,plumbous,plumbic,Pb,2,4
nitrogen,nitrous,nitric,N,3,5
phosphorus,phosphorous,phosphoric,P,3,5
arsenic,arsenious,arsenic,As,3,5
antimony,antimonus,antimonic,Sb,3,5
sulfur,sulfurous,sulfuric,S,4,6
