1 jan 1829 ano - Döbereiner
Developed 'triads', groups of 3 elements with similar properties.
Lithium, sodium and potassium formed a triad.
Calcium, strontium and barium formed a triad.
Chlorine, bromine and iodine formed a triad.
Adicionado na linha do tempo:
Contributions to Periodic table
Data:
