Gold (Au)
Introduction
When was Gold discovered? We don't know because there were no records of it. But people guessed it was discovered around Egyptian times because when people were digging around they found jewelry that was covered in gold.
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Gold's physical properties
1. Hard
2. Smooth
3. Conducts electricity
4. Soft/easy to shape
5. Can be pressed into a thin sheet (gold leaf)
6. Highly non-reactive (if put with other metals nothing would happen)
Why is gold considered important ?
Gold is considered important because it is worth money
and it can be used for many things.
When was Gold discovered? We don't know because there were no records of it. But people guessed it was discovered around Egyptian times because when people were digging around they found jewelry that was covered in gold.
https://885fa5ce61295ebf3c84-35b073afd3cf2f7bae35b2b9457774cf.ssl.cf2.rackcdn.com/news/gold_bars.jpg
Gold's physical properties
1. Hard
2. Smooth
3. Conducts electricity
4. Soft/easy to shape
5. Can be pressed into a thin sheet (gold leaf)
6. Highly non-reactive (if put with other metals nothing would happen)
Why is gold considered important ?
Gold is considered important because it is worth money
and it can be used for many things.
http://www.blackoutmercurial.com/images/soccer%20shoes/Newest%20Nike%20Mercurial%20Vapor%20IX%20cleats2.jpg
Gold's uses
1. Jewelry
2. Coins/money
3. Electronics
4. Satellites
5. Medicine
6. Fillings for cavities
7. Paint
8. Building decorations
Things you need to know about gold
Chemical name: gold
Chemical symbol: Au
Atomic number: 79
Atomic mass: 196.96657 ± 0.00004 u
Solid metal
Original color: gold
Element group name: gold
Melting point: 1,948°F (1,064°C)
Boiling point: 5,173°F (2,856°C)
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Symbol: Au Melting point: 1,948°F (1,064°C) Atomic number: 79 Boiling point: 5,173°F (2,856°C) Atomic mass: 196.96657 ± 0.00004 u |
1. Gold has been discovered on every continent on Earth.
2. One ounce of gold can be drawn into a wire 50 miles long
3. One of the heaviest metals, gold is 19.3 times heavier than water.
4. The world's gold supply increases only 2,000 tons per year. It is limited.
5. The word gold derives from the Old English word gelo meaning yellow.
6. In 1848, a gold rush took place in the U. S. It brought 100,000 prospectors to California.
7. Pure gold is more valuable than pure lead.
8. The U. S. government stores gold in bars that weigh 28 pounds each.
9. Gold is one of the most expensive metals.
10. Romans and Egyptians used gold in their jewelry.
11. All the world's gold would fill a container that measures 55 feet by 55 feet by 55 feet.
12. Gold has been found in every part of the world.
13. A total of eighty-eight thousand tons of gold have been extracted from Earth. This means all the gold that has been dug up so far in history would, if melted, make a cube measuring approximately 25x25x25 meters.
14. Absolutely pure gold is so soft that it can be moulded with the hands.
15.According to some, there’s enough gold in the Earth’s crust to cover the entire land surface knee-deep.
16.The biggest gold nugget that has ever been found weighed approximately 90 kilogram and was dug up in Australia.
17. Very few chemicals can attack gold, so that’s why it keeps its shine even when buried for thousands of years.
18. Gold is very rare compared with diamonds.
19. AU is the chemical symbol of gold. It comes from the Latin word called aurum.
20.Gold is a popular choice when it comes to rewarding achievement with medals, statues and trophies. Academy Award, Olympic and Nobel Prize winners all receive golden items in recognition of their achievement.
2. One ounce of gold can be drawn into a wire 50 miles long
3. One of the heaviest metals, gold is 19.3 times heavier than water.
4. The world's gold supply increases only 2,000 tons per year. It is limited.
5. The word gold derives from the Old English word gelo meaning yellow.
6. In 1848, a gold rush took place in the U. S. It brought 100,000 prospectors to California.
7. Pure gold is more valuable than pure lead.
8. The U. S. government stores gold in bars that weigh 28 pounds each.
9. Gold is one of the most expensive metals.
10. Romans and Egyptians used gold in their jewelry.
11. All the world's gold would fill a container that measures 55 feet by 55 feet by 55 feet.
12. Gold has been found in every part of the world.
13. A total of eighty-eight thousand tons of gold have been extracted from Earth. This means all the gold that has been dug up so far in history would, if melted, make a cube measuring approximately 25x25x25 meters.
14. Absolutely pure gold is so soft that it can be moulded with the hands.
15.According to some, there’s enough gold in the Earth’s crust to cover the entire land surface knee-deep.
16.The biggest gold nugget that has ever been found weighed approximately 90 kilogram and was dug up in Australia.
17. Very few chemicals can attack gold, so that’s why it keeps its shine even when buried for thousands of years.
18. Gold is very rare compared with diamonds.
19. AU is the chemical symbol of gold. It comes from the Latin word called aurum.
20.Gold is a popular choice when it comes to rewarding achievement with medals, statues and trophies. Academy Award, Olympic and Nobel Prize winners all receive golden items in recognition of their achievement.
BIBLIOGRAPHY
1. Tocci, Salvatore. Gold. New York: Children's, 2005. Print.
2. Murray, Peter. Gold. North Mankato, MN: Smart Apple Media, 2002. Print.
3. "The Periodic Table." Periodic Table of Elements and Chemistry. N.p., n.d. Web. 24 Mar. 2013.
4. "Chem for Kids glossary." Chem for Kids. http://www.chem4kids.com/files/elem_intro.html. 3/24/13
5. Family Encyclopedia. New York: Oxford UP, 1997. Print.
6. Gold: A Book and Kit. London: British Museum in Association with the Metropolitan Museum of Art, 1998. Print.
2. Murray, Peter. Gold. North Mankato, MN: Smart Apple Media, 2002. Print.
3. "The Periodic Table." Periodic Table of Elements and Chemistry. N.p., n.d. Web. 24 Mar. 2013.
4. "Chem for Kids glossary." Chem for Kids. http://www.chem4kids.com/files/elem_intro.html. 3/24/13
5. Family Encyclopedia. New York: Oxford UP, 1997. Print.
6. Gold: A Book and Kit. London: British Museum in Association with the Metropolitan Museum of Art, 1998. Print.