-
460 BCE
Democritus
The theory of Democritus held that everything is composed of "atoms", which are physically, but not geometrically, indivisible. -
322
Aristotle
Aristotle was a Greek philosopher and scientist born in the city of Stagira, Chalkidice, on the northern periphery of Classical Greece.At seventeen or eighteen years of age, he joined Plato's Academy in Athens -
John Dalton
John Dalton FRS was an English chemist, physicist, and meteorologist. He is best known for his pioneering work in the development of modern atomic theory; and his research into colour blindness, sometimes referred to as Daltonism, in his honour. -
Robert Brown
The elements arranged in families, ordered in order of increasing atomic number (the number of protons in the nucleus). Brownian Motion. The jerking movement of microscopic particles only visible under a high powered microscope. It was discovered by the biologist Robert Brown in 1827. -
Albert Einstine
Albert Einstein became famous for the theory of relativity, which laid the basis for the release of atomic energy. In 1905 Albert Einstein formulates Special Theory of Relativity. Einstein calculates how the movement of molecules in a liquid can cause the Brownian motion.
