Everything present in this universe is made of materials that researchers have named 'matter.' The matter is composed of tiny small particles. It isn't persistent yet is particulate.
Matter is anything that consumes space and has mass. Particles of the issue have space among them and are constantly moving. The issue or the matter will attract each other.
The atoms are the parts that are present with the matter.
The term diffusion refers to the matter particles with the intermixing of their own. It is done with the help of the fixation of the spaces between the particles. The process of intermixing the particles is known as diffusion. The main applications of diffusion are mixing two gases, dissolvement of a solid into a liquid, etc.