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alloy of mercury with another metal (usually silver) used by dentists to fill cavities in teeth; except for iron and platinum all metals dissolve in mercury and chemists refer to the resulting mercury mixtures as amalgams amalgam , dental amalgam
rare polyvalent metallic element of the platinum group; it is found associated with platinum atomic number 44 , Ru , ruthenium
white hard metallic element that is one of the platinum group and is found in platinum ores; used in alloys with platinum atomic number 45 , Rh , rhodium
silver-white metallic element of the platinum group that resembles platinum; occurs in some copper and nickel ores; does not tarnish at ordinary temperatures and is used (alloyed with gold) in jewelry atomic number 46 , palladium , Pd
hard brittle blue-grey or blue-black metallic element that is one of the platinum metals; the heaviest metal known atomic number 76 , Os , osmium
heavy brittle metallic element of the platinum group; used in alloys; occurs in natural alloys with platinum or osmium atomic number 77 , Ir , iridium
converter that uses a platinum-iridium catalyst to oxidize pollutants and carbon monoxide into carbon dioxide and water; an antipollution device on an automotive exhaust system catalytic converter
hard and corrosion resistant mineral that is a natural alloy of osmium and iridium (usually containing small amounts of rhodium and platinum); used in needles and pen nibs etc. iridosmine , osmiridium
elements such as gold, silver and platinum metal
materials like aluminum or platinum become magnetized in a magnetic field but it disappears when the field is removed paramagnetism
crude native platinum platina
fine black powder of platinum; used as a catalyst in chemical reactions platinum black
thermometer that measures temperature by changes in the resistance of a spiral of platinum wire platinum thermometer , resistance thermometer
pale alloy of gold usually with platinum or nickel or palladium white gold
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