1 janv. 1869 - Development of the Periodic Table Begins
Description:
In 1869 Russian chemist Dimitri Mendeleev started the development of the periodic table, arranging chemical elements by atomic mass. He predicted the discovery of other elements, and left spaces open in his periodic table for them.Ajouté au bande de temps:
Date:
1 janv. 1869
Maintenaint
~ Il y a 156 ans