Particle Density

Particle density refers to the amount of particles present in a specific volume of a substance. Think of it as how tightly packed the particles are within a given space. Higher particle density means more particles occupy the same volume, which can affect properties like weight, viscosity, or how substances flow. For example, a dense block of metal has closely packed atoms, making it heavier than a less dense material like foam with fewer particles in the same space. Particle density helps scientists understand material composition, behavior, and how substances interact at the microscopic level.