Caesium chloride may be considered to form interpenetrating simple primitive cubic crystals. The edge length of unit cell is $412\;pm$. Determine the ionic radius of $Cs^{+}$ if the ionic radius of $Cl^{-}$ if the ionic radius of $Cl^{-}$ is $181$ P.m Given $M(C_s)=133\;g\;mol^{-1}$

Question

$\begin{array}{1 1} 175.8\;pm \\ 7 \;pm \\ 34.8\;pm \\ 9.6\;pm \end{array}$