Platinum

Platinum By: Maddie and Stephanie

__**Definition of Platinum**__- a light, metallic gray with very slight bluish tinge when compared with silver

symbol= pt Atomic number= 78 Atomic mass= 195.09 number of Protons= 78 number of Neutrons= 117 number of Electrons= 78 melting point is 1772 degrees C Bioling piont is 3827 degrees C normal phase is a solid

 **History​** ​ Platinum belongs to the transitional metal family. The origan of name is Spanish. It was discoverd by Antonio de Ulloa in 1735. Antonio de Ulloa was a Spanish general, explorer, author, astronomer, and colonial administrator. First the Spanish considered Platinum a nusince beacause it inerfered with mining, untill they found out platinum was more rare and more expensive then gold. In Berlin platinum was used to make labratory instruments in 1784. France used it to make crucibles for glass. Spain was using platinum to make expensive cutlery, watch-chains and coat buttons. Early in the 19th century platinum was used for gun parts, sophisticated batteries and fuel cells, the production of caustic chemicalsm, and the purification of hydrogen. for a vidio, click here! []  ** Jewelry ** Platinum jewelry remained rare until high-temperature jeweler's torches were developed. After this, jewellery mackers had quick advantage to platinum. As jewelers became more familar with using platinum, it quickly became of choice of many people.From being the metal that polluted the gold of the Conquistadors, to being the rarest or even the most precious of the precious metals for jewry .

The sources of platinum productimited. The demand for platinum is essentially satisfied by the mining activities in just two regions. The Bushveld Complex, which is just north of Pretoria (South Africa’s capital) produce more than two thirds of the annual platinum supply. The Noril’sk-Talnakh region in the extreme north of Siberia in Russia supplies the rest. Russia is the only nation with significant stocks of platinum. But many believe that these may be running out.  ** Platinum Coins **  In November of 1983, The Isle of Man, a British Crown Possession, issued a one ounce Noble platinum bullion coin. The highly successful Noble enticed other mints to issue their own platinum coins. During the second half of 1988, Australia (the Koala) and Canada (the Maple Leaf) introduced platinum legal tender bullion coins within three months of each other. Both introductions were enormously successful, bringing the level of investment demand to new highs. For nearly ten years, Australia’s Koala and Canada’s Maple Leaf were among the leading platinum coins in annual sales. Not until 1997 was the platinum American Eagle released. ​ ​ Cool Facts about platinum  5 ounces costs $4,220 Platinum was 8x more than gold in 1920 Platinum is commonly used in wedding rings 1990 platinum was $500 dollars per ounce 24.5% of platinum is used in jewlrey The most expensive Hello Kitty in the world is made out of pure platinum Finbe platinum will ghlow hot red in the vapor of methyl alchol Hydrogen and oxygen explode in the presents of platinum All the platinum ever mined would fit in a average size living room Platinum is the heavyest metel ever =[]= centros5.pntic.mec.es ||  || **http://www.periodic-table.org.uk/element-platinum.htm** @http://www.spock.com/Antonio-de-Ulloa/pictures ||
 * Limited Sources ** 
 * julianhewitt.com
 * @http://periodic.lanl.gov/elements/78.html ||  ||


 * @http://unctad.org/infocomm/anglais/platinum/characteristics.htm@http://www.absoluteastronomy.com/topics/Antonio_de_Ulloa ||  ||   ||
 * @http://jewelry.about.com/od/platinumjewelry/Platinum_and_Platinum_Jewelry_Metals_in_the_Platinum_Family.htm @http://www.flashmfg.com/platinum1.htm @http://www.mindat.org/min-3236.html ||  ||