Choose two elements with the same cubic crystal structure and one that has a different one. Calculate for each one their coordination number, atom per unit cell, the size of $"a",$ the atomic packing factor, and density. Compare and discuss your results. Is the theoretical density similar to the one found in literature? $(4p)$

$\backslash$table$[[$Metal$,\backslash$table$[[$Crystal$],[$Structure$]],\backslash$table$[[$Atomic Radius$],[(nm)$