A solid with atoms in a particularly organized arrangement is called a crystalline solid.

Here's why:

* Crystalline solids have a highly ordered, repeating pattern of atoms, ions, or molecules. This arrangement extends throughout the entire solid, forming a crystal lattice.

* This regular structure is responsible for many of the properties of crystalline solids, such as their sharp melting points, distinct shapes, and ability to diffract X-rays.

In contrast, amorphous solids lack a long-range order in their atomic arrangement. Examples of amorphous solids include glass, rubber, and plastics.