26 maio 1820 ano - Discovery of the Relative Atomic Mass (Dobereiner)

Descrição:

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.

Adicionado na linha do tempo:

Data: