For the first row transition metals the `E^(ɵ)` 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 irregularities in the electrode potential values of the first-row transition metals, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Electrode Potential**:
The electrode potential (E°) of a metal ion in solution is influenced by several thermodynamic factors. The main factors include:
- Enthalpy of sublimation (ΔH_sublimation)
- Ionization enthalpy (ΔH_ionization)
...