The ionisation potentials of atoms `A` and `B` are `400` and `300 kcal mol^(-1)` respectively. The electron gain enthalpy of these atoms are `80.0` and `85.0 kcal mol^(-1)` respectively. Which of the atoms has highrt electronegativity.

Explanation

To determine which atom, A or B, has higher electronegativity, we will use Mulliken's electronegativity formula. The formula states:

\[ \text{Electronegativity} = \frac{\text{Ionization Potential} + \text{Electron Gain Enthalpy}}{2} \]

Where:
- Ionization Potential (IP) is the energy required to remove an electron from an atom.
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