1 gen 1894 anni - Noble Gasses Discovered
Descrizione:
In 1894 Sir William Ramsay and Lord Rayleigh discovered the noble gases, which were added to the periodic table as group 0.In 1897 English physicist J. J. Thomson first discovered electrons; small negatively charged particles in an atom. John Townsend and Robert Millikan determined their exact charge and mass.
Aggiunto al nastro di tempo:
Data:
1 gen 1894 anni
Adesso
~ 130 years ago
