30 авг 1869 г. - Mendeelev's Periodic Table
Описание:
Mendeleev published his first periodic table - arrangement of elements according to atomic mass. He put those with similar properties were in the same vertical column of the table.Добавлено на ленту времени:
Дата:
30 авг 1869 г.
Сейчас
~ 156 г назад