19 ч 23 мин, 2 янв 1841 г. - Amedeo Avogadro discovered equal volumes of gases contained equal
numbers of molecules,
thereby distinguishing molecules
from atoms and proposing
the existence of diatomic
molecules. The
Chemical community
later honored
Avogadro by naming
the number of molecules
in 1 mole "Avogadro's number."