jan 31, 1834 - Dmitri Mendeleev
Description:
In 1869, just five years after John Newlands put forward his law of octaves, a Russian chemist named Dmitri Mendeleev published a periodic table. Mendeleev also arranged the elements known at the time in order of relative atomic mass, but he did some other things that made his table much more successful.Added to timeline:
Date:
jan 31, 1834
Now
~ 191 years ago