The correct expression for the "Allred and Rochow" scale is:
- AElectronegativity $= 0.744 \, \frac{Z_{eff.}}{r^2} + 0.359$
- BElectronegativity $= 0.359 \, \frac{r^2}{Z_{eff.}} + 0.744$
- CElectronegativity $= 0.359 \, \frac{Z_{eff.}}{r} + 0.744$
- DElectronegativity $= 0.359 \, \frac{Z_{eff.}}{r^2} + 0.744$
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