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

Key Concepts

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.