Why crystal is a good insulator (based on energy band)
Answer to Problem 14Q
Solution:
It requires large energy to create a
Explanation of Solution
The 3s shell of is partially filled, there is one electron in the shell. The 2p shell of is partially filled, with five electrons in the shell.
In sodium chloride ( )one electron from the 3s shell in is transferred to the 2p shell in , which results in filled shells for both ions. When we consider many ions, the resultingbands in are either completely filled (the valence band)or completely empty (the conduction band). It requires large energy to create a conduction electron by raising an electron from the valence band to the conduction band. Due to this high energy is a good insulator.
Chapter 29 Solutions
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