How would you test a piece of palladium to see whether it is a metal?
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Traditionally, metals have certain characteristic physical properties: they are usually shiny (they have "lustre"), have a high density, are ductile and malleable, usually have a high melting point, are usually hard, and conduct electricity and heat well. However this is mainly because the low density, soft, low melting point metals happen to be reactive, and we rarely encounter them in their elemental, metallic form. Metals are also sonorous, which means that they conduct sound well.\n\nAnd not all metals are magnetic!\n\nPalladium is a soft silver-white metal that resembles platinum. It doesn't tarnish in air. Palladium is the least dense and has the lowest melting point of the platinum group metals. It is soft and ductile when annealed and greatly increases its strength and hardness when it is cold-worked. Palladium is chemically attacked by sulfuric and nitric acid but dissolves slowly in hydrochloric acid. This metal also does not react with oxygen at normal temperatures.
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There are 5 steps to take in mineral idenfication, they are: \n\nStep 1 \nDetermine the luster (metallic or nonmetallic) of your mineral. \n\nStep2 \nDetermine the hardness of your mineral. Using a glass plate, see if the mineral scratches it. Be careful, make sure the glass is on a table, do not hold in your hand. Firmly grasp your mineral and draw it over the glass. If the mineral powders, then use your fingernail to feel if the glass is scratched. \n\nStep3 \nDetermine whether your mineral is light-colored or dark-colored (nonmetallics only). \n\nStep4 \nDetermine whether your sample has cleavage. \n\nStep5 \nYour choices have been narrowed down, using the chart see which physical properties match up with your mineral.
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Obviously, an unreactive metal. Well, you can galvanise the zinc, or you can paint it (I'm serious).
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There is a whole battery of scientific tests used in mineral identification today however there are a number of tests that have been in use for a very long time which still work well.\n1) Observation - what does it look like, colour, the streak it leaves on an unglazed tile. the weight in your hand etc.\n2) Hardness. Its resistance to being scratched by a range of other minerals (Moe's scale)\n3) Density - how much it weighs compared to the same volume of water.\n4) The shape and form of its crystals.\n5) Chemical analysis.\nIf you put these together with a lot of experience there are not many minerals you cannot identify.
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Flame tests show the color of the metal (the positive ion). The negative ion is usually nitrate (NO3) or sulfate (SO4) which are colorless.
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yes, with an alloy or equal or lower melting point
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metallic if it is bonded to another metal or ionic if it is bonded to a non-metal.
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If you can measure the weight and volume of the ring, you could find its density.  The value will be different depending on what purity it is (24k will be denser than 12k, for example).  Most gold in jewelry is not 24k, but some alloy with nickel, copper, etc. that makes it harder.  These alloys are also how you get white, pink, and green gold.\n\nBiting a ring will only give you marks if it is 24k gold.\n\ndensity would be the easiest way, I'd say.  (density = mass/volume)\nYou'll need the equipment to measure pretty small masses and volumes, though, which most people don't have in their kitchens.
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Mag inspection utilizes the phenomenon of ' magnetic lines of force' to indicate flaws in metal castings or machinings.\n\nThis only works with pieces made of ' magnetic' material, such as Iron, steel. ( Stainless and aluminum will NOT work ). \n\nA fine powder of Iron Oxide is sprinkled liberally on the piece to be inspected.  A strong magnetic field is applied from a coil.  If a crack or void exists, the uniform lines of magnetic force will be ' distorted' around the flaw, making the Iron Oxide gather in that area.  The area can then be marked with a grease pen, and analyzed for quality control, rejected, or repaired.
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For example a way of finding material properties of steel, is to stretch a piece up to material yielding.\nThis way the test piece is destructed,\n\nThere so many examples of test where you destroy the piece \nTo collect experimental Data.\nThis is not good because the piece might be expensive,\nor too large, or it is just the one, or it is out of reach,\nor many pieces are to be tested, and so on.\n\nA non-destructive test has many advantageous and less expensive.\nUltra sonic equipments are widely used for testing.\nMacro waves are also used.
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GOLD-PLATINUM-PALLADIUM TEST\nBy Delos Toole\n\nSelect ore samples suspected to contain Gold-Platinum-Palladium and use concentrates equal to the size of one navy bean or pea. Place the concentrates in a clean test tube and add 1cc Nitric Acid and 3cc Hydrochloric Acid, (this a solution named Aqua Regia which is used regularly when testing.) Boil this over a lamp flame for about 5 to 8 minutes. Should this Aqua Regia solution contain Gold-Platinum-Palladium then the following tests will react with various colors, (good idea to practice on known samples of Gold-Platinum-Palladium for color and reaction identification and become familiar to them.)\n\nTest for Gold (Au).\n\nPrepare a solution for Stannous Chloride for each 8 hour period as this solution does not hold up under extended time periods. Dissolving Metallic Tin (Sn) in Hydrochloric Acid (HC1), where the resulted solution will be called Stannous Chloride (SnC1). Place about 2cc of HC1 in a clean test tube and add 1 or 2 small bit pieces of Metallic Tin to the test tube and bring this to a slight boil. You now have Stannous Chloride (SnC1).\n\nNow begin the gold test by making a spot test with freshly made Stannous Chloride by placing a piece of filter paper onto a clean piece of glass and place one drop of Aqua Regia solution in the center of the filter paper, and then add to this mixture one drop of freshly made Stannous Chloride solution. If gold is present there will show up on the filter paper a purple or rose colored spot when the filter paper has dried; the darker the color the more gold will be present; for low grade ore the spot color will appear plainer. Should the filter paper dry out completely, then add 1 more drop of Stannous Chloride solution to the filter paper to bring out the color.\n\nBegin the test for Platinum (Pt) by placing 20 drops of Aqua Regia solution onto a clean porcelain evaporating dish and boil this over a lamp flame until it is dry, then allow this to remain over the lamp flame for about an extended one second.\n\nPlace the dish where it can cool for a few minutes so as not to break the dish. After cooling, place 4cc of distilled water, (or water free from Chlorine), and reheat just to the boiling point. Filter this solution onto another clean porcelain evaporating dish. Add to this dish, Potassium Iodide equal to one grain of rice. Warm this solution slightly over the lamp flame and observe the color that appears. The results for this test will show if Platinum (Pt) is present as the solution will begin to turn to a light or dark rose color within a few minutes time.\n\nThe more Platinum present in the solution, (ore sample), the quicker and darker the color will appear.\n\nSulphides and other impurities, most likely will give a red color to the solution and will be mistaken for the rose color, if so, then boil off about one-half of the solution to quicken the evaporation process. Then let the porcelain dish set until completely dry, then add a few drops of clean plain water, (no chlorine water). The result will then be a bright rose color, and should there be Sulphides or other impurities in the solution they will appear as colorless. If this solution should appear red, then add a few cc’s of plain water to dilute the dark rose color to a lighter rose color, then you have Platinum (Pt).\n\nTesting for Palladium(Pd).\n\nIn the test for Platinum (Pt), upon adding Potassium Iodide (KI) and warming the procedure, if Palladium (Pd) is present in the sample ore, the solution will turn a dark color or black, which depends upon the amount of Palladium (Pd) present. The more Palladium (Pd) present, the darker the color will be, and also there will be a black precipitate in the bottom of the porcelain dish, which when adding an excess of Potassium Iodide (KI) will dissolve giving a wine-red color appearance.
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depends on the type of metal
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If it's metallic, it could be sodium or potassium.
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Try Copper Test by points
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you could put it in water and see if it tarnishes quickly?\n\ngold is relatively stable, and doesn't tarnish. you could also try to test it's electrical conductivity if you have an ohm-meter. gold conducts electricity very well. you may need more info to do this though.\n\ngood luck
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You would complete dissolve it in strong acids and then separate the metals by qualitative analysis techniques.  Not simple and very expensive.
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make sure you know the material you are being tested on