The three basic crystal structures are called Hexagonal Close Packed (HCP), Face Centered Cubic (FCC) and Body Centered Cubic (BCC).Shown below are alternative representations of the structures in Figure 1.The order in which they are represented is:
Correct answer: A. BCC, HCP, FCC
- A. BCC, HCP, FCC
- B. BCC, FCC, HCP
- C. FCC, HCP, BCC
- D. HCP, BCC, FCC
Explanation
The correct sequence is Option A: BCC, HCP, FCC. The BCC structure is characterized by atoms at each corner and one in the center of the cube. The HCP structure features a hexagonal arrangement, typically with two layers of closely packed spheres. The FCC structure has atoms located at each face center and corner of the cube. Options B, C, and D misalign these visual identifiers with their respective structures, leading to incorrect sequences.
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