Solids consist of closely packed molecules which form a rigid structure.
Solids are held together by a residual electrostatic attraction which is generally weaker than a molecular bond. Solids usually consist of a simple geometric pattern of atoms or molecules which is repeated over and over again in all directions, which is known as a crystal . Metals therefore conduct electricity very easily. Liquids also contain closely packed molecules, but they do not have a rigid orientation. They still feel an electrostatic attraction, and they regularly bump into each other, but they can move around with relative ease.