Scientists discover that pattern is beyond triad (14h 4min, jan 2, 1829 y – 17h 10min, dec 2, 1858 y)
Description:
Scientists: Jean Baptiste Dumas, Leopold Gmelin, Ernst Lenssen, Max von Pettenkofer, and J.P. Cooke
Fluorine added to Halogen group
Added to timeline:
Date:
14h 4min, jan 2, 1829 y
17h 10min, dec 2, 1858 y
~ 29 years