1 янв 1871 г. - Mendeleev's Periodic Table Created (1871)
Описание:
Russian chemist Dmitri Mendeleev's periodic table emerged as the defining document of the elements. Mendeleev left spaces open in his table for elements that were not yet discovered.Добавлено на ленту времени:
Дата:
1 янв 1871 г.
Сейчас
~ 154 г назад