Gold :: essays research papers fc

Gold, zero point can compare to this precious metal. A symbol of wealth and prosperity, it has been a value for explorers and adventurers and a lure for conquerors. Today it is vital to commerce and pay popular in ornamentation, and increasing importance in technology.The nature of gilded is diverse. The chemical element amber is a heavy, soft metal. It weighs nearly doubly as much as lead. Shiny and deep yellow in color, gold is one of two metals, which are not gray or white when pure. Gold is the most ductile of metals. Properties of gold are ? image - Au? Atomic subdue &8211 79? Atomic Weight &8211 196.967? electron Configuration - -32-18-1? Group in Periodic Table &8211 1B? Density at 68 F &8211 19.3 g/cm3? Boiling pip &8211 5,370.8 F? Melting Point &8211 1,945.4 F ? Number of Protons/Electrons &8211 79? Number of Neutrons &8211 118? Classification &8211 Transition Metal? Crystal Structure &8211 CubicFacts? appointment of Discovery &8211 Circa 3000 BC? Discover &8211 Unkn own? Name of Origin &8211 From the one-time(a) English word geolo (yellow)? Symbol Origin &8211 From the Latin word aurum (gold)? Uses &8211 electronics, jewelry, coins? Obtained From &8211 change surface of the earth, copper oresAtomic and Chemical PropertiesIn it&8217s usual state &8211 atomic mass number 197 &8211 gold is stable. However, there are radioactive (unstable) isotopes of mass number 186 to 196 and 198 to 203. Gold normally exhibits a chemical valence of one or three.Gold is the &8220noblest of the noble metals (gold, platinum, palladium, and rhodium), so termed because of their inertness, or waver to enter into chemical reactions. Gold will not react with ordinary acids but is attacked by a three-to-one mixture of hydrochloric and nitric acids. This combination is called greenish blue regia because it reacts with the so-called royal metal. Gold will not combine at once with oxygen, but oxides may be formed indirectly. Gold will overly combine with the halogen s (fluorine, chlorine bromine, and iodine) and with the cyanides.The purity of gold is expressed in Karats (KT), on a overcome of 24, or in fineness, on a scale of 1,000. Pure gold is 24 Karat or 1,000 fine. An alloy containing 75 percent gold would be described as 18- Karat gold or 750 fine.History(Sanskrit Jval Anglo &8211 Saxon gold L. aurum, gold) Known and highly determine from earliest times, gold is found in nature as the put down metal and in tellurides it is very widely distributed and is almost always associated with quarts or pyrite.