when molecules are even throughout a space, it is called

7 minutes ago 2
Nature

When molecules are evenly distributed throughout a space, it is called equilibrium. This is the state when molecules have spread out to the extent that their concentration is uniform, and although the molecules continue to move, there is no net change in concentration over time. This condition is often achieved by diffusion, the process of molecules moving from an area of higher concentration to an area of lower concentration until they are evenly spread out.