Nature of Solids

1. Nature of Solids

2. Crystalline Solids • Solid in which the representative particles exist in a highly ordered, repeating pattern. • Most solids are crystalline solids • Has a sharp melting point where it becomes a free flowing liquid • Ex. (Salt, Sugar, Snow) • Unit Cells- Representative group that is repeated throughout a crystal structure

3. Types of Unit Cells

4. Amorphous Solids • Solid in which the arrangement of representative particles lacks a regular, repeating pattern. • Often referred to as supercooled liquids • When heated become softer and softer over a wide range of temperatures before it melts • Can be looked at as though the liquid was cooled to such low temperatures that it has a high viscosity and the viscosity is high enough to prevent liquid flow. • Ex. (Glass, Rubber, Plastics)

5. Types of Crystalline Solids

6. Metallic Solids Malleable- Capable of being stretched or bent into different shapes

7. Molecular Solids

8. Ionic Solids

9. Covalent-Network Solids