Final answer:
Gold (Au) uses the closest packing structure, which is face-centered cubic (FCC). Diamond and graphite do not use closest packing structures.
Step-by-step explanation:
Only a few native elements use the closest packing structure, like gold (Au). The atoms in gold form a face-centered cubic (FCC) structure, which is one of the closest packing arrangements in simple metallic crystalline structures. In this type of arrangement, atoms in the third layer are not directly above atoms in either of the first two layers, creating an alternating pattern of close-packed layers.
Diamond and graphite, on the other hand, do not use closest packing structures. Diamond has a tetrahedral arrangement of carbon atoms, while graphite has layers of fused hexagonal rings.