10.3 Solids
| SOLID STRUCTURES | |
|---|---|
| Amorphous Solid | A solid with no ordered structure; includes glass and some plastics. |
| Crystalline Solid | A solid with a regular, repeating arrangement of atoms, molecules, or ions. |
| TYPES OF SOLIDS | |
|---|---|
| Ionic | -crystalline -held together by ionic bonds -greater charges and smaller ions lead to stronger ionic bonds and higher melting points -brittle |
| Molecular | -crystalline or amorphous -held together by intermolecular forces -lower melting points and tend to be softer |
| NetworkCovalent | -crystalline -held together by covalent bonds -high melting points and tend to be very hard Examples: Cdiamond and SiO2 (quartz) |
| Metallic | -crystalline -held together by metallic bonds -wide range of melting points -good conductors of electricity and heat -luster -malleable -ductile |
| CUBIC UNIT CELLS | ||
|---|---|---|
| Simple Cubic (Primitive Cubic) | Body-Centered Cubic (BCC) | Face-Centered Cubic (FCC) |
| -atoms occupy the corner positions | -atoms occupy the corner positions and the body center | -atoms occupy the corner positions and the face centers |
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