41
/
September 30, 2026
5634346
532222
2
Public Timelines
FAQ

jan 1, 1869 - Dimitri Mendeleev (1869) constructed a table of rows and columns. He places Elements horizontally according to their atomic mass and vertically according to their properties

Added to timeline:

By Callum
30 Jul 2021
2
0
343

Date:

jan 1, 1869
Now
~ 157 years ago