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Questions asked by users might not always be phrased in the clearest way.
The intensity of a peak in a UV-Vis spectrum is related to the molar absorptivity (ε) of the substance, which in turn depends on the electronic transitions involved. It's difficult to rank transition metals based solely on their position in the first row without considering specific ligands and the resulting complex formation. Factors like d-orbital splitting, the nature of the ligands, and the type of electronic transition all contribute to the intensity of the UV-Vis peaks. To get a more accurate ranking, you would need to specify the ligands and conditions for complex formation.