A crystalline solid differs from an amorphous solid in that a crystalline solid
Correct answer: A. has a long range ordered arrangement of particles and a sharp melting point
- A. has a long range ordered arrangement of particles and a sharp melting point
- B. has no definite shape
- C. softens gradually over a range of temperature
- D. is always transparent
Explanation
In a crystal every particle occupies a regular repeating position, so all the bonds are identical and break at one definite temperature, giving a sharp melting point. An amorphous solid such as glass or rubber has only short range order and therefore softens over a range instead. Glass is sometimes called a supercooled liquid for exactly this reason.
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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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