For the first row transition metals the `E^(ɵ) (M^(+2)//M))` value are:
`{:(underset(-1.18)(V),,underset(-0.91)(Cr),,underset(-1.18)(Mn),,underset(-0.44)(Fe),,underset(-0.28)(Co),,underset(-0.25)(Ni),underset(+0.34)(Cu)):}`
Explain the irregularity in the above values.

Explanation

To explain the irregularity in the standard electrode potential values (E°) for the first-row transition metals, we will analyze the electronic configurations and the factors affecting these values step by step.

### Step 1: Understanding the Electrode Potentials
The standard electrode potential (E°) values given for the first-row transition metals are:
- Vanadium (V): -1.18 V
- Chromium (Cr): -0.91 V
- Manganese (Mn): -1.18 V
- Iron (Fe): -0.44 V
...