Johann Wolfgang Döbereiner (TRIADS; he placed three elements into groups called triads) (1 ene 1829 año – 9 agos 1829 año)
Descripción:
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.Añadido al timeline:
fecha:
1 ene 1829 año
9 agos 1829 año
~ 7 months