Dmitri Mendeleev (TABLE; He described elements according to both atomic weight (now called relative atomic mass) and valence.) (1 gen 1869 anni – 18 magg 1869 anni)
Descrizione:
As he attempted to classify the elements according to their chemical properties, he noticed patterns that led him to postulate his periodic table; he claimed to have envisioned the complete arrangement of the elements in a dream.Aggiunto al nastro di tempo:
Data:
1 gen 1869 anni
18 magg 1869 anni
~ 4 months and 17 days