A solid is one of the three main states of matter, along with liquid and gas. Solids have a definite shape and volume. The particles in a solid are closely packed together and vibrate in place. They have a strong attraction to each other, which keeps them in a fixed position.
Properties of Solids:
Definite shape: Solids maintain their shape and do not flow like liquids.
Definite volume: Solids have a fixed volume and do not change their volume easily.
Strong intermolecular forces: The particles in a solid are held together by strong forces, which make them difficult to separate.
Low compressibility: Solids are difficult to compress because the particles are already close together.
High density: Solids are usually denser than liquids and gases because of the close packing of particles.