Answer: The particles in a gas are widely spread-out, while the particles in a solid are packed tightly together.
Explanation: The particles in solids and gasses behave differently. Solids are much denser than gases with particles that clump closely together, leaving very little space between them. Gases, on the other hand, are composed of particles that are widely spaced apart with no fixed volume or density. These particles are able to spread freely through a space, unlike that of solids.