3 фев 1869 г. - First periodic classification (Meyer)
Описание:
Was a chemist that developed a periodic classification of the chemical element. “-when the elements are in order of increasing atomic mass, certain sets of properties recur periodically-”Добавлено на ленту времени:
Дата:
3 фев 1869 г.
Сейчас
~ 156 г назад