Discovery of isotopes led to understanding (atomic number corresponded with properties > than mass) (19h 53min, jan 1, 1913 y – 21h 42min, dec 31, 1913 y)
Description:
by Frederick Soddy. Mendeleev and Meyer thought atomic mass was the main correspondent with properties.Added to timeline:
Date:
19h 53min, jan 1, 1913 y
21h 42min, dec 31, 1913 y
~ 12 months