1 янв 1817 г. - Johann Dobereiner
Описание:
Put forward the law of triads. The appearance and reaction of each element in the triad were similar to each others. He also discovered that the atomic mass of the middle element was close to the average of the triad.Добавлено на ленту времени:
Дата:
1 янв 1817 г.
Сейчас
~ 207 г назад
