Which metal in the first series of transition metals exhibits+1 oxidation state most frequently and why?

Explanation

To determine which metal in the first series of transition metals exhibits the +1 oxidation state most frequently, we can analyze the electronic configuration and stability of the elements in this series.

### Step-by-Step Solution:

1. **Identify the First Series of Transition Metals**:
The first series of transition metals includes Scandium (Sc) to Zinc (Zn), with the general electronic configuration of (n-1)d^1 to (n-1)d^10.

2. **Examine the Electronic Configuration of Copper**:
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