Candium Cd
+2
(ll) Cobalt Co
+2
(ll) Copper Cu
+2
(ll) Iron Fe
+2
(ll) Lead Pb
+2
(l) Mercury Hg
diatomic elemental ion
+2
(ll) Mercury Hg
+2
(ll) Nickel Ni
+2
Zinc Zn
+2
Carbon C
+2,+4
Tin Sn
+2,+4
Boron B
+3
Aluminum Al
+3
Gallium Ga
+3
Indium In
+3
(lll) Chromium Cr
+3
(lll) Iron Fe
+3
Nitrogen N
+3,+5
-3 is most common
Phosphorous P
+3,+5
-3 is most common