1. How many silicon atoms are there for the energy band diagram shown in Figure. Is the number of levels in the conduction and valence bands drawn consistently and why?
![888_Figure 6.jpg](https://secure.tutorsglobe.com/CMSImages/888_Figure%206.jpg)
2. How many energy levels are there in the Ge valence band for a Ge crystal of 1.0 cm3? Repeat this for Si.