mar 4, 1871 - Mendeleev
Description:
He was a Russian scientist that created the system of the periodic table and organized the elements into it. He did it by arranging the elements by its atomic mass, but there were certain errors in his table. Before it had holes in it but they have filled by the discovery of new elements.Added to timeline:
Date:
mar 4, 1871
Now
~ 155 years ago