[V(H2O)6]2+
hexaaquavanadium(II) ion

[V(H2O)6]3+
hexaaquavanadium(III) ion

[VO(H2O)5]2+
pentaaquaoxovanadium(IV) ion

[VO2]+
dioxovanadium(V) ion

[Fe(H2O)6]2+
hexaaquairon(II) ion

[Fe(H2O)6]3+
hexaaquairon(III) ion

[Cr(H2O)6]2+
hexaaquachromium(II) ion

[Cr(H2O)6]3+
hexaaquachromium(III) ion

[Co(NH3)6]2+
hexaamminecobalt(II) ion

[Co(NH3)6]3+
hexaamminecobalt(III) ion

[MnO4]-
manganate(VII) ion

[Mn(H2O)6]2+
hexaaquamanganese(II) ion

[CrO4]2-
chromate(VI) ion

[Cr2O7]2-
dichromate(VI) ion

Fe(H2O)4(OH)2
tetraaquadihydroxyiron(II)

Fe(H2O)3(OH)3
triaquatrihydroxyiron(III)

FeCO3
iron(II) carbonate

[Co(H2O)6]2+
hexaaquacobalt(II) ion

Co(H2O)4(OH)2
tetraaquadihydroxycobalt(II)

CoCO3
cobalt(II) carbonate

[Cu(H2O)6]2+
hexaaquacopper(II) ion

[Cu(NH3)4(H2O)2]2+
tetraamminediaquacopper(II) ion

Cu(H2O)4(OH)2
tetraaquadihydroxycopper(II)

CuCO3
copper carbonate

Cr(H2O)3(OH)3
triaquatrihydroxychromium(III)

[Cr(OH)6]3-
hexahydroxychromium(III) ion

[Cr(NH3)6]3+
hexaamminechromium(III) ion

[Al(H2O)6]3+
hexaaquaaluminium(III) ion

Al(H2O)3(OH)3
triaquatrihydroxyaluminium(III)

[Al(OH)4]-
tetrahydroxyaluminium(III) ion

[CuCl4]2-
tetrachlorocopper(II) ion

[CoCl4]-2
tetrachlorocobalt(II) ion