Which of the following must crystalline solids have?
A. Carbonates
B. Cubic structures
C. Orderly arrangement of atoms
D. Cleavage
Answer (2)
The question is asking which characteristic must crystalline solids have. The correct answer is C. Orderly arrangement of atoms. Crystalline solids are characterized by particles arranged in an organized, repeating pattern. This orderly structure maximizes the attractive interactions between particles, leading to distinct physical properties such as a definite melting point. Structures such as cubic closest-packed, body-centered cubic, and face-centered cubic are examples of how atoms can be arranged in a crystalline solid. However, having carbonates, cubic structures, or cleavage is not a necessary characteristic of all crystalline solids.
Crystalline solids must have an orderly arrangement of atoms, which is crucial for their distinct physical properties. This characteristic differentiates them from amorphous solids, which lack such organization. Therefore, the correct answer is C.
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