Domanda del libro di testo
What kinds of attractive forces exist between particles (atoms, molecules, or ions) in (a) molecular crystals?
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Ch.12 - Solids and Modern Materials
Brown14th EditionChemistry: The Central ScienceISBN: 9780134414232
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TOC.tableOfContents
- Ch.1 - Introduction: Matter, Energy, and Measurement177
- Ch.2 - Atoms, Molecules, and Ions231
- Ch.3 - Chemical Reactions and Reaction Stoichiometry216
- Ch.4 - Reactions in Aqueous Solution189
- Ch.5 - Thermochemistry175
- Ch.6 - Electronic Structure of Atoms168
- Ch.7 - Periodic Properties of the Elements150
- Ch.8 - Basic Concepts of Chemical Bonding177
- Ch.9 - Molecular Geometry and Bonding Theories200
- Ch.10 - Gases179
- Ch.11 - Liquids and Intermolecular Forces113
- Ch.12 - Solids and Modern Materials154
- Ch.13 - Properties of Solutions157
- Ch.14 - Chemical Kinetics199
- Ch.15 - Chemical Equilibrium128
- Ch.16 - Acid-Base Equilibria164
- Ch.17 - Additional Aspects of Aqueous Equilibria163
- Ch.18 - Chemistry of the Environment105
- Ch.19 - Chemical Thermodynamics164
- Ch.20 - Electrochemistry171
- Ch.21 - Nuclear Chemistry122
- Ch.22 - Chemistry of the Nonmetals82
- Ch.23 - Transition Metals and Coordination Chemistry79
- Ch.24 - The Chemistry of Life: Organic and Biological Chemistry16
Brown14th EditionChemistry: The Central ScienceISBN: 9780134414232Non è quello che usi tu?Cambia libro di testo
Capitolo 12, Problema 12a
Silicon is the fundamental component of integrated circuits. Si has the same structure as diamond. (a) Is Si a molecular, metallic, ionic, or covalent-network solid?
Guida verificata passo dopo passo1
Identify the types of solids: molecular, metallic, ionic, and covalent-network.
Consider the structure of silicon (Si) and compare it to diamond, which is a well-known covalent-network solid.
Recall that in a covalent-network solid, atoms are bonded in a continuous network entirely by covalent bonds.
Recognize that silicon, like diamond, forms a three-dimensional network of covalent bonds.
Conclude that silicon (Si) is a covalent-network solid due to its structure and bonding characteristics.
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Types of Solids
Solids can be classified into four main types: molecular, metallic, ionic, and covalent-network solids. Molecular solids consist of molecules held together by intermolecular forces, metallic solids are composed of metal atoms sharing electrons, ionic solids are formed from the electrostatic attraction between ions, and covalent-network solids consist of a continuous network of covalent bonds, leading to high melting points and hardness.
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01:31
Crystalline Solids Structure
Covalent-Network Solids
Covalent-network solids are characterized by a three-dimensional network of covalent bonds, which results in strong interatomic interactions. This structure gives these materials high melting points and significant hardness. Diamond is a classic example, and silicon (Si) shares a similar tetrahedral bonding arrangement, making it a covalent-network solid.
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04:13Crystalline vs Amorphous Solids
Silicon in Electronics
Silicon is a crucial element in the electronics industry, primarily due to its semiconducting properties. Its ability to form a covalent-network solid allows for the manipulation of its electrical conductivity through doping, which is essential for creating integrated circuits. Understanding silicon's structure helps explain its role in technology and materials science.
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01:14Main Group Elements Valence Electrons Example
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The accompanying image shows photoluminescence from four different samples of CdTe nanocrystals, each embedded in a polymer matrix. The photoluminescence occurs because the samples are being irradiated by a UV light source. The nanocrystals in each vial have different average sizes. The sizes are 4.0, 3.5, 3.2, and 2.8 nm. (a) Which vial contains the 4.0-nm nanocrystals?
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Domanda del libro di testo
Shown here are cartoons of two different polymers. Which one would have the higher melting point?
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Silicon is the fundamental component of integrated circuits. Si has the same structure as diamond. (b) Silicon readily reacts to form silicon dioxide, SiO2, which is quite hard and is insoluble in water. Is SiO2 most likely a molecular, metallic, ionic, or covalent-network solid?
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Domanda del libro di testo
What kinds of attractive forces exist between particles (atoms, molecules, or ions) in (d) and metallic crystals?
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