jan 1, 1864 - Lothar Meyer(table)
Description:
In 1864, he published The Modern Theory of Chemistry in which he published the use of atomic weights to group elements.In the work, he arranged 28 elements into 6 families that had similar chemical and physical traits.
His contribution was the use of valance, or combining power of an atom of a specific element.
Added to timeline:
Date:
jan 1, 1864
Now
~ 161 years ago