Today the fact that all matter is made up of atoms is universally accepted. Realisation of the atomic constituents of matter began in 1828 when Scottish botanist Robert Brown observed a random ceaseless motion of pollen grains suspended in a liquid. Many macroscopic properties and phenomena observed can be explained using this microscopic picture of matter being composed of atoms or molecules possessing some form of motion.
This module explains the kinetic theory and uses it to explain observed phenomena like diffusion, melting, boiling, evaporation and pressure exerted by a gas.
