Which of the following transition metals has the highest variable oxidation state?
Correct answer: D. Mn
- A. W
- B. Pt
- C. Hg
- D. Mn
Explanation
The transition metals have variable oxidation states due to the presence of unpaired electrons in their d orbitals. The highest oxidation state is determined by the number of electrons that can be accommodated in the d orbitals. The maximum number of unpaired electrons is five, which corresponds to a +7 oxidation state. Manganese has five unpaired electrons in its d orbitals, which allows it to have a maximum oxidation state of +7, the highest among the transition metals.
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About Electronic Structure of d-Block Elements
The electronic structure of d-block elements covers the filling of the (n-1)d and ns orbitals, general electronic configurations, and the exceptions shown by chromium and copper. It explains how partially filled d orbitals produce variable oxidation states, coloured ions, magnetic behaviour and complex formation, while distinguishing transition elements from elements with completely filled d subshells.
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