Glenn Seaborg's discovers plutonium, and all transuranic elements from 94-102. (22h 53min, jan 1, 1940 y – 0h 42min, dec 31, 1940 y)
Description:
Final changes to the periodic table in 20th century.Added to timeline:
Date:
22h 53min, jan 1, 1940 y
0h 42min, dec 31, 1940 y
~ 12 months