Question

which of the 3d series of the transition metals exhibits the largest number of oxidation states and why?
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Answer 1

Answer:

Manganese exhibit the largest number of oxidation states. It shows the oxidation states +2, +3, +4, +5 ,+6, and + 7. The reason for that is the maximum number of unpaired electrons present in its outermost shell i.e. 3d54s2.