According to the kinetic molecular model in gases, the particles are very far apart and occupy all the spaces made available to them. In this model, gases are made up of large numbers of small particles (such as atoms or molecules) in constant random motion. These particles are separated by large distances, and they occupy all of the space made available to them. They collide with one another and with the walls of their container, but they do not form any long-range order or structured arrangements. This behavior is in contrast to liquids and solids, where the particles are closer together and are often held together by intermolecular bonds.