The Crystalline Solid State
Goals: Crystal Structures
7.1-7.1.3 Interpreting simple crystal structures
- Recognize/identify/describe simple cubic, face-centered cubic, and body-centered cubic unit cells
- Determine formulas for solids based on the unit cell of the crystalline solid
- Describe what it means to occupy a tetrahedral or octahedral hole of a given cubic cell
Goals: Molecular Orbitals and Conductivity
7.3-7.3.2 Explaining conductors, semiconductors, and insulators using molecular orbital ideas
- Describe how molecular orbitals can create bands in solids with infinite lattices
- Describe the basis for conductivity
- Identify conductors, semiconductors, and insulators based on MO/band diagrams
- Describe the effect of temperature on a semiconductor
- Describe how doping can modify the behavior of a semi conductor
- Draw and interpret MO/band diagrams for doped materials
- Describe how band gaps change when bulk solids are reduced to nanometer sized particles