Johaan Wolfgang Döbereiner (jan 1, 1820 – dec 31, 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.
Added to timeline:
Date:
jan 1, 1820
dec 31, 1830
~ 11 years