Johann Wolfgang Döbereiner (TRIADS; he placed three elements into groups called triads) (1 jan 1829 ano – 9 ago 1829 ano)

Descrição:

He placed various groups of three elements into groups called triads. One such triad was lithium, sodium, and potassium. Triads were based on both physical, as well as chemical, properties.

Adicionado na linha do tempo:

Data:

Imagens: