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Among the following first-row transition elements, which one shows the greatest number of oxidation states?

1. Mn (Z = 25)
2. V (Z = 23)
3. Cr (Z = 24)
4. Ti (Z = 22)

Correct answer: Mn (Z = 25)

Solution

Manganese, with configuration 3d5 4s2, has the maximum number of unpaired/available electrons and exhibits oxidation states from +2 to +7.

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