Palladium

History
 
Palladium was opened in 1803 by English scientist William Hyde Wollaston. He identified his crude platinum by diluting it in aqua-regia. The name was in honor of the newly opened asteroid named Palladium. In 1868, palladium was detected in the composition of the sun.

Nowadays

Palladium is needed for many chemical reactions as a catalyst. Out of this metal with the addition of gold, rhodium, ruthenium make jewelry. Electrical contacts made from palladium are in high demand.