Coinage metals are Cu, Ag & Au and they have _ crystal system:
Correct answer: A. Cubic
- A. Cubic
- B. Hexagonal
- C. Tetragonal
- D. Trigonal
Explanation
- The coinage metals, which include copper (Cu), silver (Ag), and gold (Au), typically crystallize in the face-centered cubic (FCC) or cubic close-packed (CCP) crystal structure.- This crystal structure belongs to the cubic system, specifically the FCC arrangement, where atoms are arranged in a close-packed structure with the maximum efficiency in terms of filling space. Therefore, option a is correct.
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About Crystalline Solids
Crystalline solids contain particles arranged in a regular repeating lattice described by a unit cell. Their study includes coordination number, packing efficiency, density, anisotropy, cleavage, polymorphism and common crystal systems, along with ionic, molecular, covalent network and metallic crystals. Crystalline order differs from the random arrangement of amorphous solids.
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