What are some electrical properties of semiconductors?

1. Electrical properties of semiconductors are different from metals and insulators due to their unique conduction mechanism.

2. The electronic configuration of the elemental semiconductors plays a very important role in their electrical properties. 

3. They are from the fourth group of elements in the periodic table. 

4. They have a valence of four. 

5. Their atoms are bonded by covalent bonds. At absolute zero temperature, all the covalent bonds are completely satisfied in a single crystal of pure semiconductor like silicon or germanium.