分子を発見したのは誰？
The molecular theory of physics became firm (more on Avogadro's law). It was the study of Brownian motion by Albert Einstein (1905) and Jean Perrin (1909) that experimentally established the existence of the physical behavior of molecules. It is now possible to directly observe molecules by spectroscopic measurements, mass spectrometric measurements or atomic force microscopy. Molecules have roughly
John Dalton