  The diquark model is used to calculate the electromagnetic polarizabilities
and charge radii of the nucleons for three different potentials. Making the
scalar diquark lower in mass introduces a mixing angle $\theta $ between the
$\left| 56\right\rangle $ and $\left| 70\right\rangle $ states ,which allows an
improvement in value of all 6 properties. Generalizing the Gamov-Teller matrix
and the magnetic moment operator to the diquark model gives constraints on this
mixing. We obtain for the Richardson potential $\theta =23.2^{\circ },$
$\overline{\alpha }_p=7.9_{-0.9}^{+1.0}\times 10^{-4}fm^3,$ $\overline{\alpha
}_n=7.7_{-0.6}^{+0.3}\times 10^{-4}fm^3,$ $\overline{\beta
}_p=5.4_{-0.4}^{+1.6}\times 10^{-4}fm^3,$ $\overline{\beta }%
_n=6.7_{-0.7}^{+1.3}\times 10^{-4}fm^3,$ $\left\langle r^2\right\rangle
_p=0.37_{-0.03}^{+0.02}fm^2,$ $\left\langle r^2\right\rangle
_n=-0.07_{-0.02}^{+0.03}fm^2.$ Additional pion cloud contributions could
improve on all six results.
