KnowraNumber densityLinked fromLinked fromThe 6 pages that link to Number density, each with the reason it gives.All 6Broader topic 1Related 5Avogadro constantRelated: It expresses the particle-count side of the constant in a spatial volume.Mean free pathRelated: It sets how many potential collision partners occupy each unit of a gas.Clausius–Mossotti relationRelated: It sets how many polarizable molecules contribute to the material’s response.Lorentz–Lorenz equationBroader topic: Molecular polarizability contributes to the bulk response in proportion to molecular number density.Collision frequencyRelated: More particles in a given volume create more potential collision partners.Virial expansionRelated: It is the expansion variable whose powers organize the virial corrections.