Oksüdatsiooni tase
+2
Sn tin (II), stannous Sr+2 strontium
Cr+2 chromium (II) Ba+2 barium
+2
Ni nickel (II) Ra+2 radium
+2
Zn zinc Cd+2 cadmium
+2
Cd cadmium Hg+2 mercury (II), mercuric
+2
Mn manganese (II) Co+2 cobalt (II), cobaltous
+3
all the IIIA elements exhibit the +3 state, but Tl exhibits +1 as well
Fe+3 iron (III), ferric B+3 boron
+3
Cr chromium (III) Al+3 aluminum
+3
Ni nickel (III) Ga+3 gallium
+3
annaabi.ee 
