Which transition element of the 3d series exhibit the largest number

CBSE Class 12
1

Which transition element of the 3d series exhibit the largest number of oxidation states and why?

2

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.