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Rhodium is an element that is quickly growing in popularity It has a higher melting point and lower density than platinum It has high reflectance and is hard and durable When it is heated it turns the oxide red and at higher temperatures turns back to the element Rhodium is a major component of industrial catalytic systems It is often used to make electrical contacts like jewelry although it is usually used to make catalytic converters It is also used to make alloys that make furnace windings thermocouple elements bushings for glass fibre production electrodes for aircraft spark plugs and laboratory crucibles It is chemically inert resistant to corrosion and can withstand extremely high temperatures making the metal useful for manufacturing and industrial purposes Rhodium is sometimes used as part of the catalytic system in car catalytic converters and is used to clean up exhaust gasses to some extentA few common facts about rhodium is that its atomic number is 45 It was discovered in 1803 William Hyde Wollaston There is one valence electron and some of its characteristic properties include that it is a rare silvery-white metal that is highly reflective and has both a higher melting point and lower density than platinum The name rhodium originates from the Greek word rhodon meaning rose It is not attacked by most acids Rhodiums salts form rose-colored aqueous solutions It is in the platinum group of metals and it is in period 9 The symbol for rhodium is Rh Rhodiums atomic mass is 1029055 amu The melting point for rhodium is 1964 3567 and its boiling point is 3695 6683 Rhodium unlike other more common precious metals cannot be mined on its own and only exists as a byproduct of platinum nickel palladium and copper mining The only two places in the world that provide rhodium are South Africa and Russia South Africa provides around 70 percent of the
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