Below are listed the atomic weight, density, and atomic radius for three hypothetical alloys. For each determine whether its crystal structure is FCC, BCC, or simple cubic and then justify your determination. A simple cubic unit cell is shown in Figure 3.24.

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Alloy Atomic Radius (nm) Atomic Weight Densit (gmof) 77.4 107.6 127.3 (gcm') 8.22 13.42 9.23 0.125 0.133 0.142