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

Explanation

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

### Step 1: Identify the Elements in the 3d Series
The 3d series of transition metals includes the following elements:
- Scandium (Sc, atomic number 21)
- Titanium (Ti, atomic number 22)
- Vanadium (V, atomic number 23)
- Chromium (Cr, atomic number 24)
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