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1 gen 1869 anni - Dmitri Mendeleev's atomic theory

Descrizione:

Dmitri's theory Dmitri Mendeleev's theory was arranging the sixty three elements based on atomic mass into a periodic table.

Aggiunto al nastro di tempo:

24 ott 2017
0
0
561

Data:

1 gen 1869 anni
Adesso
~ 156 years ago