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Element: Gold

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Transcript of Element: Gold

(Au) 7/8 5/6/10 Density:
19.3 g/cm3
Melting point:
1,948 degrees fahrenheit, 1,064 degrees celcius
Boiling point:
5,174 degrees fahrenheit,
2,856 degrees celcius
Conductor of electricity,
ductile, and malleable
Shiny, it sparkles, glittery, and glossy At room temp.
it is a solid.
Somewhat smooth
Gold coins,
for example, don't
rust very easily. Neither
does jewlery
made of gold.
Number of naturally occuring isotopes: 1 (stable) (70 total)

Atomic mass: 196.96655 amu (atomic mass units)
Atomic number: 79
Classification: Metal
Group: Transition metal
Modern uses for the element, gold, include jewelry, gilding, making electric contacts, printing circuit boards, protecting space crafts and sky scrapers from heat, and much more. Most jewelry that contains gold also contains a mixture of different metals, and this is called an alloy. You will be able to find gold in infra red sensitive telescopes, coated onto samples to be able to be viewed in electron microscopy, and gold atoms can be found in photographs using chlorauric acid. Where this element was found: Coloma (An old fort near Sacramento City)
When: In 1849
Who discovered it: Gen. John A. Sutter but gold has been around for thousands of years
How the element was discovered: It was discovered by accident,when James Marshall was working at the saw mill owned by Gen. John A. Sutter, and he saw something glittering in the water he scooped it up and in his hands he had a nugget of gold.
Common historical uses: The Ancient Greeks used gold for figurines, masks, cups, beads, and buttons.
Other substances you could find the element: Gold was once mixed with egg whites and vinegar so the gold leafing could be laid down.

It has been estimated that, worldwide, the total amount of gold ever mined is 152,000 metric tons, only enough to fill 60 tractor trailers. In comparison, each year 907 million metric tons of iron are produced worldwide. This is equivalent to 6,000 times the total gold produced throughout history.

The oldest worked-gold objects, the products of the ancient Thracian civilization, were made as early as 4000 BC, and were discovered at a burial site in Varna, Bulgaria.

The "Welcome Stranger," the largest gold nugget ever to be recorded, was found in Victoria, Australia, in 1869. It weighed about 172 pounds. When it was melted down, it produced 156 pounds of pure gold!

The largest gold nugget believed to exist today is the "Hand of Faith," a 60-pound specimen discovered in Victoria, Australia, in October, 1980. It is currently on display at the Golden Nugget casino in Las Vegas.

Today, India is the world's largest consumer of gold.
Janna Feldman,
Bianca Newby,
and Sarah Kern
Full transcript