Which one of the following exhibits the largest number of oxidation states?
A
Ti(22)
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B
V(23)
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C
Cr(24)
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D
Mn(25)
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Solution
The correct option is DMn(25) Manganese has 5 unpaired electrons in 3d orbitals and 2 electrons in 4s. Mn can show 6 oxidation state from +2 (MnO) to +7 (MnO−4).