In which of the following pairs are both substances normally crystalline?
Correct answer: A. Copper and diamond
- A. Copper and diamond
- B. Copper and glass
- C. Copper and rubber
- D. Diamond and glass
Explanation
Diamond is a crystal that is transparent to opaque and generally isotropic, native copper is a polycrystal. Therefore the answer will be A.
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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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