When we have an ionic compound, we have elements with different charges, cations are known for the + charges being carried by them, in this group of elements we found the metals. Within this group of elements, we have monovalent cations (Cs+ for example), divalent cations (Ca2+), but in the transition metals we find multivalent or polyvalent ions, like Fe, that can be Fe2+, Fe3+, and Fe4+, so these elements are able to carry different charges as cations, more examples of these multivalent ions are Copper, Zinc, Manganese, and many more.