Compare the packing efficiency of face-centered cubic gold and face-centered cubic copper.
A)The efficiency of packing in the gold unit cell is higher.
B)The efficiency of packing in the copper unit cell is higher.
C)The efficiencies of packing in the unit cells of these two metals are the same.
D)Packing efficiencies are not defined for metals.
E)There is no way to compare without further information.

Question

Quizplus · Accepted Answer

Both gold and copper have face-centered cubic (fcc) crystal structures, which have a packing efficiency of approximately 74%. Therefore, the efficiencies of packing in the unit cells of these two metals are the same.

Compare the Packing Efficiency of Face-Centered Cubic Gold and Face-Centered