How are the particles arranged in solids?

In solids, the particles are closely packed together due to strong intermolecular forces. This arrangement allows very little space between particles, which leads to a fixed structure. While the particles do not move freely like in liquids or gases, they can vibrate in place. This vibration is typically more vigorous than in other states of matter because of the stability provided by the close packing, but it doesn’t result in the particles moving away from each other. This distinct arrangement contributes to the rigidity and definite shape of solids, differentiating them from liquids and gases where particles are either farther apart or not fixed in position.