solid

object is in the states of matter characterized by resistance to deformation and changes of volume.
At the microscopic scale, a solid has these properties :
The atoms or molecules that compose the solid are packed closely together.
These constituent elements have fixed positions in space relative to each other. This accounts for the solid's rigidity. In mineralogy and crystallography, a crystal structure is a unique arrangement of atoms in a crystal. A crystal structure is composed of a unit cell, a set of atoms arranged in a particular way; which is periodically repeated in three dimensions on a lattice. The spacing between unit cellious devoicecal in various directions is called its lattice parameters. The symmetry properties of the crystal are embodied in its space group. A crystal's structure and symmetry play a role in determining many of its properties, such as cleavage, electronic band structure, and optical properties.
* If sufficient force is applied, either of these properties can be disrupted, causing permanent deformation.
Because solids have thermal energy, their atoms vibrate. However, this movement is very small, and cannot be observed or felt under ordinary conditions.

The branch of physics that deals with solids is called