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The energy gap between conductionband an...

The energy gap between conductionband and valence band is of the order of 0.07 eV. It is a/an

A

insulator

B

conductor

C

semiconductor

D

alloy

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To solve the question regarding the energy gap between the conduction band and the valence band, we can follow these steps: ### Step-by-Step Solution: 1. **Understanding the Energy Bands**: - In solid-state physics, materials have two important energy bands: the valence band and the conduction band. The valence band is the range of energy levels that electrons occupy at absolute zero temperature, while the conduction band is the range of energy levels that electrons can occupy when they gain enough energy to conduct electricity. 2. **Identifying the Energy Gap**: - The energy gap (ΔE) between the conduction band and the valence band is given as 0.07 eV. This value indicates how much energy is required for an electron to jump from the valence band to the conduction band. 3. **Analyzing the Size of the Energy Gap**: - An energy gap of 0.07 eV is considered very small. In general, materials can be classified based on their energy gaps: - **Conductors**: No energy gap or very small energy gap (typically < 0.1 eV). - **Semiconductors**: Moderate energy gap (typically 0.1 eV to 3 eV). - **Insulators**: Large energy gap (typically > 3 eV). 4. **Conclusion**: - Since the energy gap of 0.07 eV is very small, it suggests that electrons can easily move from the valence band to the conduction band. This characteristic is typical of conductors, which can conduct electricity very well. 5. **Final Answer**: - Therefore, the material with an energy gap of 0.07 eV is classified as a **conductor**.
To solve the question regarding the energy gap between the conduction band and the valence band, we can follow these steps: ### Step-by-Step Solution: 1. **Understanding the Energy Bands**: - In solid-state physics, materials have two important energy bands: the valence band and the conduction band. The valence band is the range of energy levels that electrons occupy at absolute zero temperature, while the conduction band is the range of energy levels that electrons can occupy when they gain enough energy to conduct electricity. 2. **Identifying the Energy Gap**: ...
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