Zinc is not consider as a transition metal because its compounds or ions (Zn2+) contain a full filled d-orbital or sub shell and are unstable.Moreover it have only one ion which is the (Zn2+). Most transition metals are grayish or white (like iron or silver), but gold and copper have colors not seen in … Sc forms 3+ ions, losing the two 4s electrons and a 3d electron (1s2, 2s2, 2p6, 3s2, 3p6) Zn forms 2+ ions, losing only the two 4s electrons (1s2, 2s2, 2p6, 3s2, 3p6, 3d10) The transition metals are malleable (easily hammered into shape or bent). Therefore, Scandium is not a transition metal, because it forms only Sc3+ ions with n d-electrons, and Zn is not a transition metal because it forms only Zn2+ ions with all the 3d electrons present. A transition metal element is defined as an element that possesses an incomplete d sub-level in one or more of its oxidation states. Hence zinc do not form colored aqueous ions because it do not have at least one vacant d-orbital in which it can receive an electron in a reaction. These metals tend to be very hard. By definition, a transition metal must do this. Explain why Zinc is not classified as a transition metal but is classified as a d block element. Scandium and zinc are not transition metals simply because they do not form ions with incomplete d-subshells. Scandium is not a typical transition metal as its common Sc 3+ has no d electrons. Hence zinc do not form colored aqueous ions because it do not have at least one vacant d-orbital in which it can receive an electron in a reaction. Zinc is not consider as a transition metal because its compounds or ions (Zn2+) contain a full filled d-orbital or sub shell and are unstable.Moreover it have only one ion which is the (Zn2+). 13.2.2 Explain why Sc and Zn are not considered to be transition elements. The electronic configuration for a zinc atom is 1s 2, 2s 2, 2p 6, 3s 2, 3p 6, 4s 2, 3d 10. The chemistry of zinc is almost entirely governed by its +2 ion charge. Learn vocabulary, terms, and more with flashcards, games, and other study tools. :D. Okay, I did my research and I found the reason why 'Zinc is not considered to be a transition metal'. This is because it has a relatively low melting and boiling point; in general transition metals have HIGH melting and boiling points, melting at 420 °C, and boiling at 900 °C, and has the lowest melting point of all the transition metals aside from mercury and cadmium. Start studying Transition Metals. Zinc is generally not considered a transition metal as it has a full d-shell, though it is considered a transition metal in some texts. Zinc has full d orbits and therefore does not meet the definition of a transition metal, which is "a metal that forms one or more stable ions with incomplete d orbits". Hello, it's Gloria! 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