1 янв 1894 г. - Noble Gasses Discovered
Описание:
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.
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Дата:
1 янв 1894 г.
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~ 131 г назад