Johann Wolfgang Döbereiner (TRIADS; he placed three elements into groups called triads) (1 janv. 1829 – 9 août 1829)
Description:
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.Ajouté au bande de temps:
Date:
1 janv. 1829
9 août 1829
~ 7 months