The structure of matter in a solid.

In solids, shape retention is carried out due to the fact that particles cannot move freely. A rigid body retains its volume and does not shrink. The forces of interaction between molecules are huge enough to keep them in a fixed position. The structure in a solid is ordered. The potential energy of interaction of solid-state molecules is significantly greater than their kinetic energy. When connecting the centers of equilibrium of ions or atoms, we obtain a spatial crystal lattice.