1 gen 1871 anni - Mendeleev's Periodic Table Created (1871)
Descrizione:
Russian chemist Dmitri Mendeleev's periodic table emerged as the defining document of the elements. Mendeleev left spaces open in his table for elements that were not yet discovered.Aggiunto al nastro di tempo:
Data:
1 gen 1871 anni
Adesso
~ 154 years ago