Explain briefly how `+2` state become more and stable in the first half of the first row transition elements with increasing atomic number?

Explanation

To explain how the +2 oxidation state becomes more stable in the first half of the first row transition elements with increasing atomic number, we can break down the explanation into several steps:

### Step-by-Step Solution:

1. **Understanding the Transition Elements**:
The first row transition elements include Scandium (Sc) to Zinc (Zn), which corresponds to atomic numbers 21 to 30. These elements have partially filled d orbitals.

2. **Electron Configuration**:
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