The current OSHA standard is 2 micrograms per cubic meter of air averaged over an 8-hour work shift. It has six naturally occurring isotopes. Which direction does the reaction NH3(aq) + H2O(l) = NH4+ (aq) + OH-(aq) shift when solid NH4Cl is added? The frame of the Crown of Queen Elizabeth The Queen Mother, manufactured for her coronation as Consort of King George VI, is made of platinum. For the best answers, search on this site https://shorturl.im/axPUK. Where a base is desired, the halides have been used in conjunction with sodium acetate. [82] The National Institute for Occupational Safety and Health has set a recommended exposure limit (REL) for platinum as 1 mg/m3 over an 8-hour workday.[83]. See more. The +1 and +3 oxidation states are less common, and are often stabilized by metal bonding in bimetallic (or polymetallic) species. The application of these diagrams to the inner transition elements also explains the electron configurations of lanthanoids and actinoids, except for … [68][69] In addition to laboratory uses, Platinum Resistance Thermometry (PRT) also has many industrial applications, industrial standards include ASTM E1137 and IEC 60751. Watchmakers appreciate the unique properties of platinum, as it neither tarnishes nor wears out (the latter quality relative to gold). This article is about the chemical element. The electron configuration of an element describes how electrons are distributed in its atomic orbitals. The electron configuration of an ion either reflects the added electrons or the ones which have been lost. For beryllium, the first ionization potential electron comes from the 2s orbital, although ionization of boron involves a 2p electron. Created by Sal Khan. PtO2, also known as Adams' catalyst, is used as a hydrogenation catalyst, specifically for vegetable oils. He succeeded in making malleable platinum by alloying it with gold, dissolving the alloy in hot aqua regia, precipitating the platinum with ammonium chloride, igniting the ammonium chloroplatinate, and hammering the resulting finely divided platinum to make it cohere. The gold is precipitated by the addition of iron(II) chloride and after filtering off the gold, the platinum is precipitated as ammonium chloroplatinate by the addition of ammonium chloride. Electron configuration The arrangements of electrons above the last (closed shell) noble gas. Ulloa and Juan found mines with the whitish metal nuggets and took them home to Spain. Although elemental platinum is generally unreactive, it dissolves in hot aqua regia to give aqueous chloroplatinic acid (H2PtCl6):[16], As a soft acid, platinum has a great affinity for sulfur, such as on dimethyl sulfoxide (DMSO); numerous DMSO complexes have been reported and care should be taken in the choice of reaction solvent. It is a dense, malleable, ductile, highly unreactive, precious, silverish-white transition metal.Its name is derived from the Spanish term platino, meaning "little silver".. At Platinum, Alaska, about 17,000 kg (550,000 ozt) was mined between 1927 and 1975. For more info, I invite you to visit http://forums.studentdoctor.net/showthread.php?t=5... can someone explain electron configuration of platinum? For other uses, see, CRC press encyclopedia of materials and finishes, 2nd edition, Mel Schwartz, 2002, Materials handbook, fifteenth edition, McGraw-Hill, by John Vaccari, 2002, Kelly, Thomas D. and Matos, Grecia R. (2013), Crown of Queen Elizabeth The Queen Mother, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, "Atomic weights of the elements 2013 (IUPAC Technical Report)", "Currency shocks knock platinum to 10-year lows", "The status of platinum anticancer drugs in the clinic and in clinical trials", "Live USD Platinum Price Charts & Historical Data", "J. C. Chaston, Platinum Metals Rev. Electron configurations describe where electrons are located around the nucleus of an atom. [9] Platinum(II,IV) oxide, Pt3O4, is formed in the following reaction: Unlike palladium acetate, platinum(II) acetate is not commercially available. This is the currently selected item. For both nitrogen and oxygen, the electron comes from the 2p orbital, but the spin is the same for all 2p nitrogen electrons, while there is … [14], In nickel and copper deposits, platinum-group metals occur as sulfides (e.g. The Food and Drug Administration and other institutions have reviewed the issue and found no evidence to suggest toxicity in vivo. For example, a small box from burial of Shepenupet II was found to be decorated with gold-platinum hieroglyphics. These include BaPt, Ba3Pt2, and Ba2Pt. It has remarkable resistance to corrosion, even at high temperatures, and is therefore considered a noble metal. ABSTRACT. Alloying this impure platinum residue called "plyoxen" with gold was the only solution at the time to obtain a pliable compound, but nowadays, very pure platinum is available and extremely long wires can be drawn from pure platinum, very easily, due to its crystalline structure, which is similar to that of many soft metals.

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