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9 gen 1860 anni - 3) Scientist met in one of the first international chemistry conferences and decided hydrogen to be given the weight of one and all other elements would be compared to it

Aggiunto al nastro di tempo:

Kashif,Aaron,Felix,Nestor

ByKashif Naseer
25 ott 2017

Data:

9 gen 1860 anni
Adesso
~ 164 years ago
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