Question

Covalent radius of an element having 82 electrons and 82 protons is $146A^{\circ }$. Calculate the electronegativity on the Allred-Rochow scale for that element .

Answer 1

$X_{AR}=0.744+0.359\frac{Z_{eff}}{r^2}$
$=0.744+0.359\frac{82}{146\times {10}^{-10}}$
= 0.7440