Johann Wolfgang Döbereiner (TRIADS; he placed three elements into groups called triads) (1 Jan 1829 Jahr – 9 Aug 1829 Jahr)
Beschreibung:
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.Zugefügt zum Band der Zeit:
Datum:
1 Jan 1829 Jahr
9 Aug 1829 Jahr
~ 7 months