26 май 1820 г. - Discovery of the Relative Atomic Mass (Dobereiner)
Описание:
He discovered how the relative atomic mass of the middle element in a group of three is almost halfway between the lightest and the heaviest ones in the group. He called these pattern a “triad”. He organized many of the elements that (at that time) were discovered that way.Добавлено на ленту времени:
Дата:
26 май 1820 г.
Сейчас
~ 205 г назад