Name this transition metal appearing below palladium on the periodic table, with atomic number 78 and symbol Pt.
The hydrated dioxide form of this element is a catalyst in hydrogenation reactions and is called Adams's catalyst. The cis\- form of one complex containing ammonia, chlorine, and this element as a ligand is an effective chemotherapy drug. Before vanadium oxide was used, this element was the catalyst in the contact process, and it can be a catalyst in the electrolysis of water. It is found in a standard hydrogen electrode, and, like gold, it is dissolved by aqua regia. Name this transition metal appearing below palladium on the periodic table, with atomic number 78 and symbol Pt.
The hydrated dioxide form of this element is a catalyst in hydrogenation reactions and is called Adams's catalyst.
{platinum} [accept {Pt} before mentioned]