Part 4 - The 19th Century: The Noble Metals, Palladium Waits in the Wings

Medallions minted in an alloy Thomas Graham believed to be of palladium and hydrogen, which he called hydrogenium.

About the same time Wollaston began separating palladium, John Dalton began the study of a new field of study on atomic weights. He began with the gases, and in 1804, turned to metals.