\[Ti^{3+}\]
\[V^{2+}\]
\[V^{3+}\]
\[V^{4+}\]
\[V^{5+}\]
\[Cr^{2+}\]
\[Cr^{3+}\]
\[Cr^{6+}\]
\[Mn^{2+}\]
\[Mn^{4+}\]
\[Mn^{6+}\]
\[Mn^{7+}\]
\[Fe^{2+}\]
\[Fe^{3+}\]
\[Co^{2+}\]
\[Co^{3+}\]
\[Ni^{2+}\]
\[Cu^{2+}\]