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(D) The transition elements exhibit variable oxidation states due to the participation of $(n-1)d$ and $ns$ electrons in bonding.Among the given eleme

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$Mn \ (25)$

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(D) The transition elements exhibit variable oxidation states due to the participation of $(n-1)d$ and $ns$ electrons in bonding.Among the given elements,$Mn \ (Z=25)$ has the electronic configuration $[Ar] \ 3d^5 \ 4s^2$.It exhibits the largest number of oxidation states ranging from $+2$ to $+7$ $(+2, +3, +4, +6, +7)$ because it has the maximum number of unpaired electrons available for bonding.

Which one of the following exhibits the largest number of oxidation states?

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