Domanda del libro di testo
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?
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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 12b
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?
Guida verificata passo dopo passo1
Identify the types of solids: molecular, metallic, ionic, and covalent-network.
Consider the properties of SiO2: it is hard and insoluble in water.
Recall that molecular solids are typically soft and have low melting points, which does not match SiO2.
Metallic solids are characterized by metallic bonding and conductivity, which does not apply to SiO2.
Covalent-network solids are hard, have high melting points, and are insoluble in water, which matches the properties of SiO2.
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Types of Solids
Solids can be classified into different categories based on their bonding and structure. 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 feature a continuous network of covalent bonds. Understanding these categories helps in predicting the properties of materials.
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01:31
Crystalline Solids Structure
Silicon Dioxide Structure
Silicon dioxide (SiO2) has a three-dimensional network structure where each silicon atom is covalently bonded to four oxygen atoms, and each oxygen atom is bonded to two silicon atoms. This arrangement creates a strong, rigid lattice that contributes to its hardness and insolubility in water. Recognizing this structure is crucial for identifying SiO2 as a covalent-network solid.
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01:42Resonance Structures
Properties of Covalent-Network Solids
Covalent-network solids, like SiO2, exhibit unique properties such as high melting points, hardness, and low electrical conductivity. These properties arise from the strong covalent bonds that extend throughout the material, making them very stable. Understanding these characteristics is essential for determining the classification of SiO2 in the context of solid-state chemistry.
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04:13Crystalline vs Amorphous Solids
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