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1 gen 1857 anni - Carbon is Tetravalent
Descrizione:
Friedrich August Kekulé von Stradonitz proposes that carbon is tetravalent, or forms exactly four chemical bonds.
Aggiunto al nastro di tempo:
FINAL - Chemistry Timeline
By
Grace Lackey
11 gen 2018
0
0
399
Data:
1 gen 1857 anni
Adesso
~ 167 years ago
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