Why Platinum treated as grand metal?
407613
because of its low or no corrosion and high shine
977688
Metals are reductants. that is they cause reduction in a reaction and are themselves oxidised. This means they must GIVE UP electrons. If you look at the periodic table, as you go down a group (say 1st gorup), atoms have more and more shells ( the outer which contains only 1 electron). As you know, the more shells there are, the lesser tehy will be bound to the nucleus (as they experience weak core charge). This means at the bottom of the 1st group, atoms will almost willingly get rid of its valence electron. So that's why as you go down a group, they are more metallic.\n\nAs you go from the left to the right of the PT, there are more electrons in the outer shell. THis means they more and more act as an oxidant (causing oxidation to others, but in turn gets reduced). Thus, they are less metallic
407156
The corrosive properties of an acid or base depend on the concentration as well as the chemical (maybe dissolved in water).  If you put your finger in sulfuric acid, it was probably not that concentrated.\n\nNitric acid, hydrochloric acid (this is in your stomach), and fuming sulfuric acid (it gives off sulfur trioxide) are all very strong acids.\n\nIf you want to dissolve gold or platinum (very hard), you need a mixture of hydrochloric acid and nitric acid (aqua regia, read more on wikipedia).\n\nSodium hydroxide (lye) and sodium hypochlorite (bleach) are very caustic bases.\n\nIf the question is what is the most basic or acidic substance, it is hard to find a limit.  In organic chemistry, some useful compounds for synthisis are lithium-alkanes, such as n-butyl lithium.  It is an incredibly strong base because its conjugate acid, butane, is an incredibly weak acid.
103041
because it depends on the purity(karat)of the gold solution used  for the plating of any metal object.\n\ngold ions from the gold object and the gold solution will be transferred to the object to be plated\n\nif you want to plate the object to be 16K then you use an 16K soulution with an object that contains 16k purity
716527
Good question? I think it comes from platinum. A bar of pure platinum would be really expensive.
772787
Indeed, it is the metal. \n\nThe accompanying in is usually NO3 or SO4--Colorless!!\n\n\nGet an "A".
237935
francium. mercury is technicaly not a metal, it just has a low melting point, low metling points do not make it unstable. if that were the case, then oxygen would be VERY unstable ITS ALREADY TURNED INTO VAPOR!!!
870586
this is not just a argument based on semantics - metallic hydrogen is a real material at ultra low temperatures \n\nthe problem is that the word metal describes a state of matter ( in it's solid form )and only that ( is vaporized iron a gas )\n\nhydrogen can exist as a solid a liquid a gas and a plasma ( the solid is referred to as metallic hydrogen )
544136
Yup.  According to the electrochemical series, the Au3+ ion (in order to plate itself, gold must first be converted to an ion from an anode in an electrochemical cell: how that is so is another question...) is a relatively good oxidizing agent (which means itself gets reduced) when compared with other metals at least.  You can check this by seeing its standard reduction potential.  Standard reduction potential for gold is +1.50 eV while that of Fe(steel is mostly iron) is only ) 0.77eV.  The rule is that, the metal with the greater reduction potential gets plated on the one with less potential.\n\nCheck this link for a better understanding. http://en.wikipedia.org/wiki/Image:Srptable.JPG
728938
the rarest of the platinum group (PGM) is iridium\nhttp://en.wikipedia.org/wiki/Iridium\nhttp://www.platinuminfo.net/pgm_ir.html\nhttp://www.platinuminfo.net/pgm.html\n\nplatinum\nhttp://www.blanchardonline.com/blanchard_products/bullion_platinum.php
535149
Actually the copper doesn't come directly from the solution...\n\nNot sure how much detail you want, but it does use electroplating.  This means that it uses electricity to plate metal on an object.  The stainless steel object is put on the "positive end" and a lump of pure copper is placed on the "negative end."  A low voltage is used because a high voltage plates too fast, and the layer will peel off quickly.  If copper is the plating, then the solution must be a fairly low-concentration copper sulfate (CuSO4) solution, meaning that copper is the only metal present in the electrochemical cell.  The negative end is called the anode, and this decreases in mass as its copper ions are taken to the positive end -- the cathode.  \n\nThis method of plating multiple metals is actually fairly common, because the properties of each one can be combined.  Nickel can be used for farm equipment and engines because it can withstand a lot of force, silver is used for decoration, chromium is used to withstand a lot of use (like a spoon).  Copper is able to conduct heat and helps food cook evenly.
106147
It is just from the way that the elements are fused together to form the compound. It's the same as any other metal.
534040
The salty composition of even the slightest perspiration on the skin reacts with the copper in the bracelet, thereby creating on the softer of the two materials [the skin] the same blue-green patina found on copper windchimes along the seashore.  PS... The structural steel building product called Cor-Ten is purposely made to resemble rusted iron, presumably because some people feel a naturally-aged metallic look is very attractive.  Just not on their skin.
737415
There is a site specialized in precious metal values, you can find all the information regarding gold, silver, platinum etc, the name of the site is KITCO.COM.. ☺
127062
195.09 g\n\nhttp://www.noblemind.com/search.exe?keyword=Platinum+Molar+Mass&var=2
178268
The earliest method involved dissolving crude platinum ore in aqua regia, neutralizing the acid with sodium hydroxide (NaOH). Then, precipitation of the platinum metal was done by adding ammonium chloride, NH4Cl, as ammonium chloroplatinate. The element palladium was removed as palladium cyanide after treating the solution with mercuric cyanide. The material that remained was a red rhodium(III) chloride: rhodium metal was isolated via reduction with hydrogen gas.\n\nThe industrial extraction of rhodium is complex as the metal occurs in ores mixed with other metals such as palladium, silver, platinum, and gold. It is found in platinum ores and obtained free as a white inert metal which it is very difficult to fuse.\n\nIt is also possible to extract Rhodium from spent nuclear fuel, which contains an average of 400 g per metric ton of Rhodium. Rhodium produced in such a way contains radioactive isotopes with half-lives of up to 2.9 years and is therefore stored at least 20 years in a secured area to allow it to become stable.
200007
The previous poster is right:  Gold is the most ductile metal.  "Since the cohesive forces are strong and the atoms do not become widely separated from each other during their rearrangement, the metal holds together while its shape is being changed."