Discovery of isotopes led to understanding (atomic number corresponded with properties > than mass) (19 h 53 m, 1 ene 1913 año – 21 h 42 m, 31 dic 1913 año)
Descripción:
by Frederick Soddy. Mendeleev and Meyer thought atomic mass was the main correspondent with properties.Añadido al timeline:
fecha:
19 h 53 m, 1 ene 1913 año
21 h 42 m, 31 dic 1913 año
~ 12 months