Johaan Wolfgang Döbereiner (1 janv. 1820 – 31 déc. 1830)
Description:
During this time period Johaan, noticed a pattern in 3 elements.He found that the
relative atomic mass of the middle
element lay roughly halfway between the lightest and heaviest elements in the group of three.
Ajouté au bande de temps:
Date:
1 janv. 1820
31 déc. 1830
~ 11 years