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Which solid would you expect to have the largest band gap? a. As(s) b. Sb(s) c. Bi(s)
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Ch.13 - Solids & Modern Materials
Tro6th EditionChemistry: A Molecular ApproachISBN: 9780137832217
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TOC.tableOfContents
- Ch.1 - Matter, Measurement & Problem Solving118
- Ch.2 - Atoms & Elements106
- Ch.3 - Molecules and Compounds131
- Ch.4 - Chemical Reactions and Chemical Quantities56
- Ch.5 - Introduction to Solutions and Aqueous Solutions82
- Ch.6 - Gases114
- Ch.7 - Thermochemistry96
- Ch.8 - The Quantum-Mechanical Model of the Atom60
- Ch.9 - Periodic Properties of the Elements90
- Ch.10 - Chemical Bonding I: The Lewis Model89
- Ch.11 - Chemical Bonding II: Molecular Shapes, VSEPR & MO Theory85
- Ch.12 - Liquids, Solids & Intermolecular Forces51
- Ch.13 - Solids & Modern Materials47
- Ch.14 - Solutions90
- Ch.15 - Chemical Kinetics115
- Ch.16 - Chemical Equilibrium68
- Ch.17 - Acids and Bases136
- Ch.18 - Aqueous Ionic Equilibrium153
- Ch.19 - Free Energy & Thermodynamics93
- Ch.20 - Electrochemistry106
- Ch.21 - Radioactivity & Nuclear Chemistry74
- Ch.22 - Organic Chemistry140
Tro6th EditionChemistry: A Molecular ApproachISBN: 9780137832217Non è quello che usi tu?Cambia libro di testo
Capitolo 13, Problema 63
Which solid would you expect to have little or no band gap? a. Cu(s) b. Si(s) c. As(s)
Guida verificata passo dopo passo1
Understand the concept of band gap: The band gap is the energy difference between the valence band and the conduction band in a solid. A small or no band gap indicates that electrons can easily move from the valence band to the conduction band, making the material a good conductor.
Identify the types of solids: Metals typically have little or no band gap, semiconductors have a moderate band gap, and insulators have a large band gap.
Analyze the given options: (a) Cu(s) is a metal, (b) Si(s) is a semiconductor, and (c) As(s) is a metalloid.
Recall that metals, like Cu(s), have overlapping valence and conduction bands, resulting in little or no band gap.
Conclude that the solid expected to have little or no band gap is the metal, Cu(s).
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Band Gap
The band gap is the energy difference between the valence band and the conduction band in a solid material. It determines the electrical conductivity of the material; a small or nonexistent band gap allows electrons to move freely, making the material a good conductor. In contrast, a large band gap typically indicates an insulator or semiconductor.
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Intepreting the Band of Stability
Conductors vs. Semiconductors vs. Insulators
Materials are classified based on their ability to conduct electricity. Conductors, like metals, have little to no band gap, allowing electrons to flow easily. Semiconductors, such as silicon, have a moderate band gap that can be overcome under certain conditions, while insulators have a large band gap, preventing electron flow under normal circumstances.
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Metallic Properties of Copper
Copper (Cu) is a metal known for its excellent electrical conductivity due to its very small or nonexistent band gap. In metallic solids, the electrons are delocalized, allowing them to move freely throughout the structure, which is why copper is often used in electrical wiring and components.
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02:05Metal Properties
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