Question $1$

Silicon and Aluminum don't form a complete solid solution. Check which of the four HumeRothery rules are violated?

$\backslash$table$[[,$Charge,Radius,Density,EN$,$Structure,Molar mass$],[$Silicon$,S{i}^{4+},0\mathrm{.}117nm,2\mathrm{.}32\frac{g}{c}{m}^3,1\mathrm{.}9,$Diamond,$28\mathrm{.}085\frac{g}{m}$ole