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Ford Bronco

The Ford Bronco was a 4x4 SUV produced from 1966 through 1996, with four distinct generations.

It was initially introduced as a competitor for the Jeep CJ-5 and International Harvester Scout. A major redesign based on the Ford F-Series truck in the late 1970s brought a larger Bronco to compete with the Chevrolet K5 Blazer and Dodge Ramcharger. The smaller Ford Bronco II accompanied the Bronco for several years in the1980s. The late 1980s and early 1990s saw the return of the large Bronco, based on a newer F-Series.

The full-size Broncos and the successor Expedition were produced at Ford's Michigan Truck Plant in Wayne, Michigan.

The Bronco permanently entered popular culture in 1994 as the vehicle in which O. J. Simpson traveled during his (in)famous low-speed chase with police through the Los Angeles area. It was a white 1993 model owned by Al Cowlings.

1966-1977

The original Bronco was a small SUV, intended to compete with Jeeps and International Harvester Scouts. Its small size (92 inch wheelbase) made it popular for off-road and some other uses, but impractical for such things as towing.

The idea behind the Bronco began with Ford product manager Donald N. Frey, who also conceived of the Ford Mustang; and similarly, Lee Iacocca pushed the idea through into production. In many ways, the Bronco was a more original concept than the Mustang; whereas the Mustang was a fraternal twin of the Ford Falcon, the Bronco had a frame, suspension, and body which were not shared with any other vehicle.

The Bronco was designed under engineer Paul G. Axelrad. Although the axles and brakes were sourced from the Ford F-100 four wheel drive truck, the front axle was located by leading arms (from the frame near the rear of the transmission forward to the axle) and a lateral track bar, allowing the use of coil springs which gave the Bronco a tight (34 foot) turning circle, long wheel travel, and an anti-dive geometry which was useful for snowplowing. Rear suspension was more conventional, with leaf springs in a typical Hotchkiss design. A shift-on the-fly (with utmost difficulty) Dana Engineering transfer case was standard, and heavy duty suspension was an option.

The initial engine was the Ford 170 cubic inch straight six, modified with solid valve lifters, a six quart oil pan, heavy duty fuel pump, oil-bath air cleaner, and a carburetor with a float bowl compensated against tilting.

Styling was subordinated to simplicity and economy, so all glass was flat, bumpers were simple C-sections, the frame was a simple box-section ladder, and the basic left and right door skins were identical except for mounting holes.

Base price was only $2,194, but the long option list included front bucket seats, a rear bench seat, a tachometer, and a CB radio, as well as functional items such as a tow bar, an auxiliary gas tank, a power takeoff, a snowplow, a winch, and a posthole digger. Aftermarket accessories included campers, overdrive units, and the usual array of wheels, tires, chassis and engine parts for increased performance.

The Bronco initially dominated the market against the Scout and Jeep until the advent of the full-size Chevrolet Blazer in 1969, a much larger and more powerful vehicle which could offer greater luxury, comfort, space, and a longer option list including automatic transmission and power steering, and thus had broader appeal. Ford countered by enlarging the optional V8 engine from 289 cubic inches and 200 horsepower to 302 cubic inches and 205 horsepower, but this still could not match the Blazer's optional 350 cubic inches and 255 horsepower. In 1973, power steering and automatic transmissions were made optional and sales spiked to 26,300, but by then Blazer sales were double those of the Bronco, and International Harvester had seen the light and come out with the Scout II which was more in the Blazer class. For the average driver, those vehicles made more sense than the more rustically-oriented Bronco; however, the low sales of the Bronco (230,800 over twelve years) did not allow a large budget for upgrades, and it remained basically unchanged until the advent of the larger, more Blazer-like second generation Bronco in 1978. Perhaps predictably, sales of the original model peaked (30,700) in its last year, 1977, as buyers who wanted more of a fun, spunky, no frills go anywhere vehicle took advantage of their last opportunity to buy one.

Racing

In 1965, racecar builder Bill Stroppe assembled a team of Broncos for long-distance off-road competition for Ford. Partnering with Ford's frequently favored race team Holman and Moody, the Stroppe/Holman/Moody (SHM) Broncos proceeded to dominate the Mint 400, Baja 500, and Mexican 1000. In 1969 SHM again entered a team of six Broncos in the Baja 1000. In 1971, a "Baja Bronco" package partially derived from Stroppe's design was offered in the Ford showrooms, featuring quick-ratio power steering, automatic transmission, fender flares covering Gates Commando tires, a roll bar, reinforced bumpers, a padded steering wheel, and distinctive red, white, blue, and black paint. However, at a price of $5566 versus the standard V8 Bronco price of $3665, only 650 were sold over the next four years. [1]

In 1966 a Bronco dragster built by Doug Nash ran the quarter mile in 9.2 seconds, reaching 150 miles per hour top speed.

Engines

  • 1966-1972 170 in³ Straight-6
  • 1966-1968 289 in³ Windsor V8
  • 1969-1977 302 in³ Windsor V8
  • 1973-1974 200 in³ Straight-6

1978-1986 Full Size Bronco

The redesign of the Bronco in 1978 was based on the F-100 truck, sharing many chassis, drivetrain, and body components. Ford started the redesign in 1972, codenamed Project Short-Horn, but introduction was delayed by concerns over the mid-1970s fuel crisis. The increased size allowed them to compete with the full-size SUVs offered by GM (Chevrolet Blazer) and Chrysler (Dodge Ramcharger).

In the TV series 240-Robert, several 1979 Broncos were seen as rescue vehicles.

There was a major redesign of the model in 1980 (the 1980 model was based on the redesigned Ford F-series; this generation lasted until 1996 with sheetmetal changes), mostly powertrain and chassis related. A lot of cosmetics where redone. along with powertrain, suspension and other odds and ends. The ford bronco, in 1980 had the TTB (twin traction beam) setup in the front end for an independent front suspension. Engines:

  • 351 in³ 351M V8

replaced in 1982 by the

  • 351 in³ Windsor V8
  • 400 in³ 400 V8 optional through 1982 when it was eliminated from the company's lineup
  • 300 in³ Straight-6 added in 1980 — to many, the best powertrain offered for its low-end torque and legendary reliability
  • 302 in³ 302 V8 — added in 1980

1980-1986

The second oil crisis of the 1970s increased emphasis on fuel economy and led to the Bronco II design, nearer in size to the compact Ranger pick up and again sharing some chassis and drivetrain parts. However, full-size Broncos continued to be produced.

The Bronco II was short-lived since it spanned seven model years (1984 - 1990), and it was replaced by the Ford Explorer.

1987-1991

In 1987, the body and drivetrain of the full-size Bronco changed, as it was still based on the full size F-Series. Again based on the F-Series trucks in their latest redesign, continued the towing capability and storage space that the compact Bronco II lacked. Along with the body change came EFI (electronic fuel injection), which improved power and fuel economy. They were built at the Michigan Truck Plant in Wayne, Michigan on the same line as F150s.

Engines:

  • 300 in³ Straight-6
  • 302 in³ V8
  • 351 in³ Windsor V8

1992-1996

An update of the 1987 edition to go along with an F-Series truck update. Most changes were visible as cosmetics. Primary changes occurred inside of the cab, with changes concentrating in the dash and accessories. No major drivetrain changes occurred.

1997

In the 1997 model year, the Ford Expedition, which more effectively competed with GM's Chevrolet Suburban, was introduced as the successor to the Bronco. The Bronco name was dropped from production, but was reused a few years later for a similar concept car.

2004 Concept

The 2004 Bronco Concept

At the 2004 North American International Auto Show, a Bronco concept car was introduced. Some features of the concept car, such as the box-like roofline, short wheelbase, and the round headlamps are features associated with the original Bronco, but this concept car also has a 2.0-liter intercooled turbo diesel engine and a six-speed transmission. This Bronco also is like the original because of its famous off-road capabilities. Basically, this concept car basically is like the original Bronco in some ways and is also a very futuristic off-road vehicle. Ford has--and is still considering--releasing this for production, likely based on the success of the retro-themed Toyota FJ Crusier.


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Ford has--and is still considering--releasing this for production, likely based on the success of the retro-themed Toyota FJ Crusier. For example, gold is quite common in Turkey but considered a most valuable gift in Sicily. Basically, this concept car basically is like the original Bronco in some ways and is also a very futuristic off-road vehicle. The symbolic value of gold varies wildly around the world, even within geographic regions. This Bronco also is like the original because of its famous off-road capabilities. In Orthodox Christianity, the wedded couple is adorned with a golden crown during the ceremony, an amalgamation of symbolic rites. Some features of the concept car, such as the box-like roofline, short wheelbase, and the round headlamps are features associated with the original Bronco, but this concept car also has a 2.0-liter intercooled turbo diesel engine and a six-speed transmission. Wedding rings are traditionally made of gold; since it is long-lasting and unaffected by the passage of time, it is considered a suitable material for everyday wear as well as a metaphor for the relationship.

At the 2004 North American International Auto Show, a Bronco concept car was introduced. Medieval kings were inaugurated under the signs of sacred oil and a golden crown, the latter symbolizing the eternal shining light of heaven and thus a Christian king's divinely inspired authority. The Bronco name was dropped from production, but was reused a few years later for a similar concept car. Winners of races and prizes are usually awarded the gold medal (such as the Olympic Games and the Nobel Prize), while many award statues are depicted in gold (such as the Academy Awards, the Emmy Awards and the British Academy Film Awards). In the 1997 model year, the Ford Expedition, which more effectively competed with GM's Chevrolet Suburban, was introduced as the successor to the Bronco. Great human achievements are frequently rewarded with gold, in the form of medals and decorations. No major drivetrain changes occurred. Gold is associated with notable anniversaries, particularly in a 50 year cycle, such as a golden wedding anniversary, golden jubilee, etc.

Primary changes occurred inside of the cab, with changes concentrating in the dash and accessories. On the other hand, eminent orators such as John Chrysostom were said to have a mouth of gold with a silver tongue. Most changes were visible as cosmetics. American Indians of the Sioux tribe called it "The yellow metal that makes the white man crazy". An update of the 1987 edition to go along with an F-Series truck update. In Communist propaganda, the golden pocket watch and its fastening golden chain were the characteristic accessories of the class enemy, the bourgeois and the industrial tycoons. Engines:. The Golden Calf is a widely-recognised symbol of idolatry and revolt against God.

They were built at the Michigan Truck Plant in Wayne, Michigan on the same line as F150s. Gold has been associated with the extremities of utmost evil and great sanctity throughout history. Along with the body change came EFI (electronic fuel injection), which improved power and fuel economy. Gold used in dentistry is widely regarded as the safest form of restorative material, as well as the most successful. Again based on the F-Series trucks in their latest redesign, continued the towing capability and storage space that the compact Bronco II lacked. Liver and kidney damage has, however, been reported for up to 50% of arthritis patients treated with gold-containing drugs. In 1987, the body and drivetrain of the full-size Bronco changed, as it was still based on the full size F-Series. The human body does not absorb gold very well, thus compounds of gold are not normally very toxic.

The Bronco II was short-lived since it spanned seven model years (1984 - 1990), and it was replaced by the Ford Explorer. There is only one stable isotope of gold, and 18 radioisotopes with Au-195 being the most stable with a half-life of 186 days. However, full-size Broncos continued to be produced. Gold also forms:. The second oil crisis of the 1970s increased emphasis on fuel economy and led to the Bronco II design, nearer in size to the compact Ranger pick up and again sharing some chassis and drivetrain parts. Such compounds containing the Au- anion are called aurides and include caesium auride, CsAu, rubidium auride, RbAu, and tetramethylammonium auride, (CH3)4N+ Au-. replaced in 1982 by the. Gold also can under extreme conditions form a +5 state with fluorine (gold pentafluoride, AuF5), as well as (unusually for a metal), a -1 state.

Engines:. Gold compounds can be aurous (univalent, +1) or auric (trivalent, +3). The ford bronco, in 1980 had the TTB (twin traction beam) setup in the front end for an independent front suspension. Although gold is a noble metal, it can form many compounds, auric chloride (AuCl3) and chlorauric acid (HAuCl4) being the most common. along with powertrain, suspension and other odds and ends. Roosevelt expropriated gold by Executive Order 6102, and President Richard Nixon closed the gold window by which foreign countries could exchange American dollars for gold at a fixed rate. A lot of cosmetics where redone. President Franklin D.

There was a major redesign of the model in 1980 (the 1980 model was based on the redesigned Ford F-series; this generation lasted until 1996 with sheetmetal changes), mostly powertrain and chassis related. Within the United States, the private possession of gold except as jewelry and coin collecting was banned between 1933 and 1975. In the TV series 240-Robert, several 1979 Broncos were seen as rescue vehicles. Because of its use as a reserve store of value, the possession of gold is sometimes restricted or banned. The increased size allowed them to compete with the full-size SUVs offered by GM (Chevrolet Blazer) and Chrysler (Dodge Ramcharger). Prices have risen to the $570/oz ($18,300/kg) mark in early 2006 [3]. Ford started the redesign in 1972, codenamed Project Short-Horn, but introduction was delayed by concerns over the mid-1970s fuel crisis. Since 1968 the price of gold on the open market has ranged widely, with a record high of $850/oz ($27,300/kg) on 21 January 1980, to a low of $252.90/oz ($8,131/kg) on 21 June 1999 (London Fixing).

The redesign of the Bronco in 1978 was based on the F-100 truck, sharing many chassis, drivetrain, and body components. Federal Reserve Bank, in New York. In 1966 a Bronco dragster built by Doug Nash ran the quarter mile in 9.2 seconds, reaching 150 miles per hour top speed. The largest gold depository in the world is that of the U.S. [1]. Central banks still hold historical gold reserves as a store of value although the level has generally been declining. However, at a price of $5566 versus the standard V8 Bronco price of $3665, only 650 were sold over the next four years. On March 17, 1968, economic circumstances caused the collapse of the gold pool, and a two-tiered pricing scheme was established whereby gold was still used to settle international accounts at the old $35.00 per troy ounce ($1.13/g) but the price of gold on the private market was allowed to fluctuate; this two-tiered pricing system was abandoned in 1975 when the price of gold was left to find its free-market level.

In 1971, a "Baja Bronco" package partially derived from Stroppe's design was offered in the Ford showrooms, featuring quick-ratio power steering, automatic transmission, fender flares covering Gates Commando tires, a roll bar, reinforced bumpers, a padded steering wheel, and distinctive red, white, blue, and black paint. By 1961 it was becoming hard to maintain this price, and a pool of US and European banks began to act together to defend the price against market forces. In 1969 SHM again entered a team of six Broncos in the Baja 1000. For a long period the United States government set the price of gold at $20.67 per troy ounce ($664.56/kg) but in 1934 the price of gold was set at $35.00 per troy ounce ($1125.27/kg). Partnering with Ford's frequently favored race team Holman and Moody, the Stroppe/Holman/Moody (SHM) Broncos proceeded to dominate the Mint 400, Baja 500, and Mexican 1000. As part of this system, governments and central banks attempted to control the price of gold by setting values at which they would exchange it for currency. In 1965, racecar builder Bill Stroppe assembled a team of Broncos for long-distance off-road competition for Ford. Historically gold was used to back currency in an economic system known as the gold standard in which one unit of currency was equivalent to a certain weight of gold.

Perhaps predictably, sales of the original model peaked (30,700) in its last year, 1977, as buyers who wanted more of a fun, spunky, no frills go anywhere vehicle took advantage of their last opportunity to buy one. The price of gold is determined on the open market, but a procedure known as the Gold Fixing in London, originating in 1919, provides a twice-daily benchmark figure to the industry. For the average driver, those vehicles made more sense than the more rustically-oriented Bronco; however, the low sales of the Bronco (230,800 over twelve years) did not allow a large budget for upgrades, and it remained basically unchanged until the advent of the larger, more Blazer-like second generation Bronco in 1978. The purity of a gold bar can also be expressed as a decimal figure ranging from 0 to 1, known as the millesimal fineness, such as 0.995. In 1973, power steering and automatic transmissions were made optional and sales spiked to 26,300, but by then Blazer sales were double those of the Bronco, and International Harvester had seen the light and come out with the Scout II which was more in the Blazer class. When it is alloyed with other metals the term carat or karat is used to indicate the amount of gold present, with 24 carats being pure gold and lower ratings proportionally less. Ford countered by enlarging the optional V8 engine from 289 cubic inches and 200 horsepower to 302 cubic inches and 205 horsepower, but this still could not match the Blazer's optional 350 cubic inches and 255 horsepower. Like other precious metals, gold is measured by troy weight and by grams.

The Bronco initially dominated the market against the Scout and Jeep until the advent of the full-size Chevrolet Blazer in 1969, a much larger and more powerful vehicle which could offer greater luxury, comfort, space, and a longer option list including automatic transmission and power steering, and thus had broader appeal. No commercially viable mechanism for performing gold extraction from sea water has yet been identified. Aftermarket accessories included campers, overdrive units, and the usual array of wheels, tires, chassis and engine parts for increased performance. The effort produced little gold and cost the German government far more than the commercial value of the gold recovered. Base price was only $2,194, but the long option list included front bucket seats, a rear bench seat, a tachometer, and a CB radio, as well as functional items such as a tow bar, an auxiliary gas tank, a power takeoff, a snowplow, a winch, and a posthole digger. Unfortunately, his assessment of the concentration of gold in sea water was unduly high, probably due to sample contamination. Styling was subordinated to simplicity and economy, so all glass was flat, bumpers were simple C-sections, the frame was a simple box-section ladder, and the basic left and right door skins were identical except for mounting holes. Fritz Haber (the German inventor of the Haber process) attempted commercial extraction of gold from sea water in an effort to help pay Germany's reparations following the First World War.

The initial engine was the Ford 170 cubic inch straight six, modified with solid valve lifters, a six quart oil pan, heavy duty fuel pump, oil-bath air cleaner, and a carburetor with a float bowl compensated against tilting. The world's oceans hold a vast amount of gold, but in very low concentrations (perhaps 1-2 parts per billion). A shift-on the-fly (with utmost difficulty) Dana Engineering transfer case was standard, and heavy duty suspension was an option. The possibility of cheap man-made gold would have unforeseen economic and political consequences. Rear suspension was more conventional, with leaf springs in a typical Hotchkiss design. No economically feasible method to manufacture gold artificially has been found and published yet. Although the axles and brakes were sourced from the Ford F-100 four wheel drive truck, the front axle was located by leading arms (from the frame near the rear of the transmission forward to the axle) and a lateral track bar, allowing the use of coil springs which gave the Bronco a tight (34 foot) turning circle, long wheel travel, and an anti-dive geometry which was useful for snowplowing. However, it is possible to obtain infinitesimally small amounts of gold by artificial nuclear transformations in particle accelerators The gold isotopes produced would likely be radioactive.

Axelrad. Modern science has since proven the impossibility of making gold from other elements via chemical reactions. The Bronco was designed under engineer Paul G. porcelain), while searching in vain for the philosopher's stone, which was supposed to turn mercury into gold. In many ways, the Bronco was a more original concept than the Mustang; whereas the Mustang was a fraternal twin of the Ford Falcon, the Bronco had a frame, suspension, and body which were not shared with any other vehicle. Scientists, kings and charlatans obsessed with the secret art of alchemy accidentally invented practically useful materials (e.g. Frey, who also conceived of the Ford Mustang; and similarly, Lee Iacocca pushed the idea through into production. The idea of producing gold out of lesser metals or other cheap substances has fascinated people throughout the centuries.

The idea behind the Bronco began with Ford product manager Donald N. Other methods of assaying and purifying smaller amounts of gold include parting and inquartation as well as cuppelation, or refining methods based on the dissolution of gold in aqua regia. Its small size (92 inch wheelbase) made it popular for off-road and some other uses, but impractical for such things as towing. After initial production, gold is often subsequently refined industrially by the Wohlwill process or the Miller process. The original Bronco was a small SUV, intended to compete with Jeeps and International Harvester Scouts. In South America, the controversial project Pascua Lama aims at exploitation of rich fields in the high mountains of Atacama, at the border between Chile and Argentina. . Kolar Gold Fields in India is another example of a city being built on the greatest gold deposits in India.

It was a white 1993 model owned by Al Cowlings. Siberian regions of the USSR also used to be significant in the global gold mining industry. Simpson traveled during his (in)famous low-speed chase with police through the Los Angeles area. Mines in South Dakota and Nevada supply two-thirds of gold used in the United States. J. Other major producers are Canada, United States and Western Australia. The Bronco permanently entered popular culture in 1994 as the vehicle in which O. The Second Boer War of 1899–1901 between the British Empire and the white Boers was at least partly over the rights of miners and possession of the gold wealth in South Africa.

The full-size Broncos and the successor Expedition were produced at Ford's Michigan Truck Plant in Wayne, Michigan. Gold fields in the Orange Free State and the Transvaal are deep and require the world's deepest mines. The late 1980s and early 1990s saw the return of the large Bronco, based on a newer F-Series. The city of Johannesburg was built atop the world's greatest gold finds. The smaller Ford Bronco II accompanied the Bronco for several years in the1980s. This decline was due to the increasing difficulty of extraction and changing economic factors affecting the industry in South Africa. A major redesign based on the Ford F-Series truck in the late 1970s brought a larger Bronco to compete with the Chevrolet K5 Blazer and Dodge Ramcharger. Production in 1970 accounted for 79% of the world supply, producing about 1,000 tonnes, however production in 2004 was 342 tonnes.

It was initially introduced as a competitor for the Jeep CJ-5 and International Harvester Scout. Since the 1880s South Africa has been the source for a large proportion of the world's gold supply. The Ford Bronco was a 4x4 SUV produced from 1966 through 1996, with four distinct generations. It is claimed, that all the gold that has been mined throughout the history of mankind could be incorporated in a solid ball with a diameter of 27 metres. 351 in³ Windsor V8. Ore grades of 30 g/1000 kg (30 ppm) are usually needed before gold is visible to the naked eye, therefore in most gold mines you will not see any gold. 302 in³ V8. Economic gold extraction can be achieved from ore grades as little as 0.5 g/1000 kg (0.5 ppm) on average in large easily mined deposits, typical ore grades in open-pit mines are 1–5 g/1000 kg (1-5 ppm), ore grades in underground or hard rock mines are usually at least 3 g/1000 kg (3 ppm) on average.

300 in³ Straight-6. Gold occurs in sea water at 0.1 to 2 mg/t (0.1 to 2 ppb by weight) depending on sample location. 302 in³ 302 V8 — added in 1980. Another important ore type is in sedimentary black shale and limestone deposits containing finely disseminated gold and other platinum group metals. 300 in³ Straight-6 added in 1980 — to many, the best powertrain offered for its low-end torque and legendary reliability. In all these deposits the gold is in its native form. 400 in³ 400 V8 optional through 1982 when it was eliminated from the company's lineup. Primary deposits can be weathered and eroded, with most of the gold being transported into stream beds where it congregates with other heavy minerals to form placer deposits.

351 in³ Windsor V8. There are several primary deposit types, common ones are termed reef or vein. 351 in³ 351M V8. A deposit usually needs some form of secondary enrichment to form an economically viable ore deposit: either chemical or physical processes like erosion or solution or more generally metamorphism, which concentrates the gold in sulfide minerals or quartz. 1973-1974 200 in³ Straight-6. The primary source of gold is usually igneous rocks or surface concentrations. 1969-1977 302 in³ Windsor V8. Hydrothermal ore deposits of gold occur in metamorphic rocks and igneous rocks; alluvial deposits and placer deposits originate from these sources.

1966-1968 289 in³ Windsor V8. Gold is widely distributed in the Earth's crust at a background level of 0.03 g/1000 kg (0.03 ppm by weight). 1966-1972 170 in³ Straight-6. Rarer mineral associations are petzite, calaverite, sylvanite, muthmannite, nagyagite and krennerite. The most common sulfide associations are pyrite, chalcopyrite, galena, sphalerite, arsenopyrite, stibnite and pyrrhotite. Common gold associations are quartz often as veins and sulfide minerals.

These grains occur between mineral grain boundaries or as inclusions within minerals. Occasionally large accumulations of native gold (also known as nuggets) occur but usually gold occurs as minute grains. Due to its relative chemical inertness gold is usually found as the native metal or alloy. Because of its historically high value, much of the gold mined throughout history is still in circulation in one form or another.

During the 19th century, gold rushes occurred whenever large gold deposits were discovered, including the California, Colorado, Otago, Australia, Witwatersrand, Black Hills, and Klondike gold rushes. For modern attempts to produce artificial gold, see gold synthesis. Their symbol for gold was the circle with a point at its center (☉), which was also the astrological symbol, the Egyptian hieroglyph and the ancient Chinese character for the Sun (now 日). Although they never succeeded in this attempt, the alchemists promoted an interest in what can be done with substances, and this laid a foundation for today's chemistry.

The primary goal of the alchemists was to produce gold from other substances, such as lead — presumably by the interaction with a mythical substance called the philosopher's stone. Gold in antiquity was relatively easy to obtain geologically; however, 75% of all gold ever produced has been extracted since 1910.[2] It has been estimated that all the gold in the world that has ever been refined would form a single cube 20 m (66 ft) a side. Gold has been used as a symbol for purity, value, royalty, and particularly roles that combine these properties (see gold album). Gold has long been considered one of the most precious metals, and its value has been used as the standard for many currencies (known as the gold standard) in history.

The European exploration of the Americas was fueled in no small part by reports of the gold ornaments displayed in great profusion by Native American peoples, especially in Central America, Peru, and Colombia. Exploitation is said to date from the time of Midas, and this gold was important in the establishment of what is probably the world's earliest coinage in Lydia between 643 and 630 BC. The south-east corner of the Black Sea was famed for its gold. Gold is also mentioned several times in the Old Testament.

Egypt and Nubia had the resources to make them major gold-producing areas for much of history. Egyptian hieroglyphs from as early as 2600 BC describe gold, which king Tushratta of the Mitanni claimed was as "common as dust" in Egypt. It may have been the first metal used by humans and was valued for ornamentation and rituals. Gold ( Sanskrit jval, Greek χρυσóς [khrisós], Latin aurum for "shining dawn", Anglo-Saxon gold, Chinese 金 [jīn],Japanese 金 [kin] ) has been known and highly valued since prehistoric times.

Because of its high electrical conductivity and resistance to corrosion and other desirable combinations of physical and chemical properties, gold also emerged in the late 20th century as an essential industrial metal. Gold and its many alloys are most often used in jewelry, coinage and as a standard for monetary exchange in many countries. Pure gold is too soft for ordinary use and is hardened by alloying with silver, copper, and other metals. [1].

Recent research undertaken by Frank Reith of the Australian National University shows that microbes play an important role in the formation of gold deposits, transporting and precipitating gold to form grains and nuggets that collect in alluvial deposits. The added metal is oxidized and dissolves allowing the gold to be displaced from solution and be recovered as a solid precipitate. Gold ions in solution are readily reduced and precipitated out as gold metal by the addition of virtually any other metal as the reducing agent. Common oxidation states of gold include +1 (gold(I) or aurous compounds) and +3 (gold(III) or auric compounds).

Heat, moisture, oxygen, and most corrosive agents have very little chemical effect on gold, making it well-suited for use in coins and jewelry; conversely, halogens will chemically alter gold, and aqua regia dissolves it. Gold is a good conductor of heat and electricity, and is not affected by air and most reagents. As the amount of silver increases, the color becomes whiter and the specific gravity lower. Native gold contains usually eight to ten per cent silver, but often much more — alloys with a silver content over 20% are called electrum.

Adding copper yields a redder metal, iron blue, Silver produces green, aluminium purple, platinum metals white, and natural bismuth together with silver alloys produce black. This can be done to increase its strength, or create several exotic colors, sold for instance in the western United States to the tourist trade as "Black Hills" gold. A soft metal, gold will readily form alloys with many other metals. It is the most malleable and ductile metal known; a single gram can be beaten into a sheet of one square metre, or an ounce into 300 square feet.

Only silver colloids exhibit the same interactions with light, albeit at a shorter frequency, making silver colloids yellow in color. These colors are the result of gold's plasmon frequency lying in the visible range, which causes red and yellow light to be reflected, and blue light to be absorbed. Gold is a metallic element with a characteristic yellow color, but can also be black or ruby when finely divided, while colloidal solutions are intensely colored and often purple. .

Its ISO currency code is XAU. Gold forms the basis for a monetary standard used by the International Monetary Fund (IMF) and the Bank for International Settlements (BIS). For millennia, gold has served as money and is also used in jewelry, dentistry, and in electronics. The metal occurs as nuggets or grains in rocks and in alluvial deposits and is one of the coinage metals.

A soft, shiny, yellow, dense, malleable, ductile (trivalent and univalent) transition metal, gold does not react with most chemicals but is attacked by chlorine, fluorine and aqua regia. Gold is a chemical element in the periodic table that has the symbol Au (from the Latin aurum) and atomic number 79. The Columbia Electronic Encyclopedia, 6th ed. Los Alamos National Laboratory – Gold.

Gold hydrazide: an olive-green powder, AuN2H3, one of several explosive compounds known archaically as aurum fulminans. Gold cluster compounds. Gold chalcogenides (O, S, Se,Te). Gold halides (F,Cl,Br,I).

The AuCl4- ion after dissolving in aqua regia. Green gold (a gold/silver alloy) is used in specialized jewelry while gold alloys with copper (reddish color) are more widely used for that purpose (rose gold)*. White gold (an alloy of gold with platinum, palladium, nickel, and/or zinc) serves as a substitute for platinum. Only the salts and radioisotopes (mentioned above) have any evidence of medicinal value.

For similar reasons, it also used as the basis for some superstitious, over the top, health claims. Some use it as an excuse to create super-expensive delicacies ($1,000 cocktails). Having no reactivity it adds no taste but is taken as a delicacy. Called varak or (varaq) in India.

Gold flake is used on and in some gourmet sweets and drinks. The gold isotope Au-198, (half-life: 2.7 days) is used in some cancer treatments and for treating other diseases. However, it can also cause photosensitive rashes, gastrointestinal disturbance, and kidney damage. It inhibits lymphocyte proliferation, lysosomal enzyme release, the release of reactive oxygen species from macrophages, and IL-1 production.

Disodium aurothiomalate is a treatment for rheumatoid arthritis (administered intramuscularly). Since it is a good reflector of both infrared and visible light, it is used for the protective coatings on many artificial satellites. Many competitions and honors, such as the Olympics and the Nobel Prize, award a gold medal to the winner (with silver to the second-place finisher, and bronze to the third.). Gold is used as a coating enabling biological material to be viewed under a scanning electron microscope.

It is also the usual starting point for making other gold compounds. Gold(III) chloride is used as a catalyst in organic chemistry. Chlorauric acid is used in photography for toning the silver image. It is also the form used as gold paint on ceramics prior to firing.

Colloidal gold (a gold nanoparticle) is an intensely colored solution that is currently studied in many labs for medical, biological and other applications. Gold is used in restorative dentistry especially in tooth restorations such as crowns and bridges. The resistance to oxidation of gold has led to its widespread use as thin layers electroplated on the surface of electrical connectors to ensure a good connection. Gold performs critical functions in computers, communications equipment, spacecraft, jet aircraft engines, and a host of other products.

Gold can be made into thread and used in embroidery.