Ionization energies of atoms A and B are 400 and $300 \mathrm{k}$ cal $\mathrm{mol}^{-1}$ respectively. The…
Ionization energies of atoms A and B are 400 and $300 \mathrm{k}$ cal $\mathrm{mol}^{-1}$ respectively. The electron affinities of these atoms are $80.0$ and $85.0 \mathrm{k}$ cal $\mathrm{mol}^{-1}$ respectively. Then which is the correct statement regarding electronegativity $\chi ?$
$\chi_{\mathrm{A}} < \chi_{\mathrm{B}}$
$\chi_{\mathrm{A}}>\chi_{\mathrm{B}}$
$\chi_{\mathrm{A}}=\chi_{\mathrm{B}}$
none of these
Solution
Electronegativity of an atom $=\frac{\mathrm{IE}+\mathrm{EA}}{2 \times 62.5}$
where IE and EA are in k cal mol $^{-1}$.