The low-energy state of condensed matter that is characterized by structural rigidity and resistance to changes of shape or volume is a solid.
Solids are made up of particles that are closely packed together in a regular arrangement, which gives them a definite shape and volume. The strong intermolecular forces in solids hold the particles in a fixed position, leading to their structural rigidity.
In contrast to gases, liquids, and plasmas, solids maintain their shape and volume due to the stable arrangement of their particles. This stability makes solids able to resist changes in shape or volume, making them suitable for structural purposes and various applications in daily life.
