Which solids are called true solids _______________?
Correct answer: C. Crystalline
- A. Metallic
- B. Amorphous
- C. Crystalline
- D. Vitreous
Explanation
Crystalline solids have particles arranged in a regular repeating pattern and therefore possess long-range order; they are commonly called true solids. Amorphous or vitreous solids lack this regular long-range arrangement. Students may choose amorphous because such materials are rigid, but rigidity alone does not make a solid crystalline.
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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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