apr 20, 1811 - Amedeo Avogadro corrects Daltons Theory
Description:
When Avogadro said "that equal volumes of gases at equal temperature and pressure contain the same number of particles Avogadro's law made it possible to accurately estimate the atomic masses of elements and made a clear distinction between atoms and molecules".Source:
https://www.thoughtco.com/history-of-atomic-theory-4129185
Added to timeline:
Date:
apr 20, 1811
Now
~ 214 years ago