Dimitri Mendeleev & Periodic Table (dec 30, 1868 – may 6, 1869)
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.Added to timeline:
Date:
dec 30, 1868
may 6, 1869
~ 4 months and 6 days