The chemical property of transition metals that allow their ions to be easily identified as different from aluminium, and Group 1 and 2 metals is the presence of multiple oxidation states. Transition metals have a varying number of valence electrons, which enable them to form ions with different charges and oxidation states. In contrast, aluminium, Group 1, and Group 2 metals typically form ions with a single oxidation state. This property makes it easier to distinguish transition metals from other groups of elements when analyzing chemical reactions or compounds.
