Which type (or types) of crystalline solid is characterized by each of the following? (a) High mobility of electrons throughout the solid;

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Identify the key characteristic given in the problem: 'High mobility of electrons throughout the solid.'

Understand that the mobility of electrons suggests that the electrons can move freely within the structure of the solid.

Recall that in crystalline solids, the arrangement and bonding of the atoms, ions, or molecules determine their properties.

Recognize that the free movement of electrons is a characteristic of metallic solids, where electrons are delocalized and can move freely throughout the metal lattice.

Conclude that the type of crystalline solid characterized by high mobility of electrons throughout the solid is a metallic solid.

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Crystalline Solids

Crystalline solids are materials whose constituents, such as atoms or molecules, are arranged in a highly ordered microscopic structure, forming a crystal lattice that extends in all directions. This ordered arrangement gives rise to distinct physical properties, including specific melting points and anisotropic behavior, where properties vary based on direction within the crystal.

Electrical Conductivity

Electrical conductivity refers to the ability of a material to conduct electric current. In solids, this property is largely determined by the presence of free-moving charge carriers, such as electrons. Materials with high electrical conductivity, like metals, allow electrons to move freely, facilitating the flow of electricity throughout the solid.

Types of Crystalline Solids

Crystalline solids can be categorized into different types based on their bonding and structure, including ionic, covalent, metallic, and molecular solids. Metallic solids, characterized by a 'sea of electrons' that allows for high mobility of electrons, are particularly noted for their excellent electrical conductivity, distinguishing them from other types of crystalline solids.

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Which type (or types) of crystalline solid is characterized by each of the following? (d) network of covalent bonds.

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What kinds of attractive forces exist between particles (atoms, molecules, or ions) in (a) molecular crystals?

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Which type (or types) of crystalline solid is characterized by each of the following? (b) softness, relatively low melting point;

Textbook Question

Which type (or types) of crystalline solid is characterized by each of the following? (c) high melting point and poor electrical conductivity;