platinum group
six noble, precious metallic elements clustered together in the periodic table: ruthenium, rhodium, palladium, osmium, iridium, and platinum
platinum
chemical element with symbol Pt and atomic number 78
palladium
chemical element with symbol Pd and atomic number 46
ruthenium
chemical element with symbol Ru and atomic number 44
osmium
chemical element with symbol Os and atomic number 76
rhodium
chemical element with symbol Rh and atomic number 45
iridium
chemical element with symbol Ir and atomic number 77