Which of the 3d series of the transition metals exhibits the largest number of oxidation states and why?

Explanation

To determine which of the 3d series of transition metals exhibits the largest number of oxidation states, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the 3d Series Transition Metals**:
The 3d series of transition metals includes Scandium (Sc, atomic number 21), Titanium (Ti, atomic number 22), Vanadium (V, atomic number 23), Chromium (Cr, atomic number 24), Manganese (Mn, atomic number 25), Iron (Fe, atomic number 26), Cobalt (Co, atomic number 27), Nickel (Ni, atomic number 28), Copper (Cu, atomic number 29), and Zinc (Zn, atomic number 30).

2. **Determine the Electronic Configurations**:
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