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xplanation Scandium and zinc are the correct answer because they are the only two elements in the first transition series that have only one oxidation state. Scandium has an oxidation state of +3, while zinc has an oxidation state of +2. The other options, copper, nickel, and chromium, all have multiple oxidation states. Rate this question: Y . 8. When d-sublevel contains eight electrons, the number of half-filled orbitals equals ........ OA.1 B. 2 C.3 D. 4 Correct Answer B.2 Explanation When the d-sublevel contains eight electrons, it means that all five d orbitals are filled with two electrons each. In this case, there are two half- filled orbitals, which are the 3d3 and 3d8 orbitals. The other three orbitals, 3d1, 3d2, and 3d7, are completely filled or empty. Therefore, the number of half-filled orbitals is 2. T ——————————— [ 7E . Big Banks in Don’t Like It When Canadians