Name: Platinum Symbol: Pt Atomic Number: Atomic Mass: amu. Melting Point: °C ( K, °F) Boiling Point: °C ( K Symbol : Pt. Certainly there are aesthetic reasons for choosing platinum for a wedding and engagement ring over yellow gold or rose gold. Platinum. Hallmarking of platinum jewellery, weighing over g has been compulsory you can see the second stamp is the traditional fineness symbol. In the early s, Barnett Rosenberg was conducting experiments on bacteria, measuring the effects of electrical currents on cell growth. Acid can burn your skin and is fatal if ingested. After publishing the report in , Ulloa did not continue to investigate the new metal. This led him to believe he was working with a single metal, but in truth the ore still contained the yet-undiscovered platinum-group metals. Drop a small amount of the silver testing solution onto the metal. Watchmakers appreciate the unique properties of platinum, as it neither tarnishes nor wears out the latter quality relative to gold. In Lide, David R. Tell us more about it? The STERLING part indicates that your jewelry is real sterling silver. CAS number The Chemical Abstracts Service registry number is a unique identifier of a particular chemical, designed to prevent confusion arising from different languages and naming systems. I Iron Indium Iodine Iridium. WHO Regional Office for Europe, Copenhagen, Denmark. She has even held the position of Jedi master at an observatory.