Amorphous solids
Definition
Amorphous solids are non-crystalline materials where the atoms and molecules are not arranged in a definite lattice pattern. They lack long-range order, distinguishing them from crystalline solids.
5 Must Know Facts For Your Next Test
- Amorphous solids have no sharp melting point; they soften over a range of temperatures.
- Common examples include glass, plastics, and gels.
- Their atomic structure is similar to that of liquids but with greater rigidity.
- They exhibit isotropic properties, meaning their physical properties are the same in all directions.
- Despite lacking a crystalline structure, they can still be formed into various shapes and used in numerous applications.
Review Questions
- What distinguishes amorphous solids from crystalline solids?
- Name three common examples of amorphous solids.
- Why do amorphous solids soften over a range of temperatures rather than having a sharp melting point?
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Related terms
Crystalline Solid: A solid material whose atoms or molecules are arranged in a highly ordered structure, forming a crystal lattice that extends in all directions.
Isotropic: Having identical values of a property in all directions; often used to describe the uniformity of physical properties in amorphous solids.
Glass Transition Temperature: The temperature range over which an amorphous solid (such as glass) transitions from a hard and relatively brittle state into a molten or rubbery state.
