A team of scientists have invented a new technique to determine the dynamics of microscopic interacting particles by using image recognition to count the number of particles in an imaginary box ...

Factors affecting the rate of diffusion If a crystal of a coloured chemical, eg potassium manganate (VII), is placed in water, the particles spread out and mix with the water particles.

The need for diffusion Diffusion Particles - molecules or ions - in a liquid and a gas are constantly moving randomly. Because of this movement, particles will spread themselves evenly throughout.