Final answer:
Particles are arranged in a crystal structure in a sample of Ag (s), or solid silver. This is because metals form crystalline solids with a regular, three-dimensional array of atoms. Ag (s) demonstrates this crystalline structure, unlike gases or liquids such as H₂ (g), Br₂ (L), and Ar (g), which do not.
Step-by-step explanation:
Particles are arranged in a crystal structure in a sample of Ag (s), which is silver in its solid state. Silver, like many other metals, forms a crystalline solid where atoms are arranged in a regular and repeating pattern that extends in three dimensions. This crystal lattice structure is due to the efficient packing of atoms which maximizes attractive interactions and minimizes total intermolecular energy.
A crystal is a substance where the particles are organized in an orderly, repeating, three-dimensional pattern. In contrast, particles in a gas or a liquid, such as H₂ (g), Br₂ (L), and Ar (g), do not form such structures. Gases have particles separated by large distances and move freely, while liquids have particles that are close but can slide past one another.
In Ar (g), particles are far apart and moving freely. In Br₂ (L), which is bromine in its liquid state, particles are close but not fixed in place. In H₂ (g), hydrogen gas, particles are also far apart and moving freely. Unlike these substances, the metallic solid Ag (s) has a distinct crystal lattice, described in terms of packing of spheres, such as hexagonal closest-packed structures or cubic closest-packed.