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amalgam, atomic number 44, atomic number 45, atomic number 46, atomic number 76, atomic number 77, catalytic converter, dental amalgam, ir, iridium, iridosmine, os, osmiridium, osmium, palladium, paramagnetism, pd, platinum black, platinum thermometer, resistance thermometer, rh, rhodium, ru, ruthenium, white gold

noble metal

atomic number 78, pt