Difference between revisions of "Gold"
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{{element | name=Gold | symbol=Au | anumber=79 | noe=79 | amass=196.96655 amu}} | {{element | name=Gold | symbol=Au | anumber=79 | noe=79 | amass=196.96655 amu}} | ||
| − | '''Gold''' is a chemical [[element]]. It is a precious [[metal]] which has been used as [[money]]. Gold is found in nature as nuggets or grains in rocks, underground and in deposits. It is a soft, shiny, yellow metal | + | '''Gold''' is a chemical [[element]]. It is a precious [[metal]] which has been used as [[money]]. Gold is found in nature as nuggets or grains in rocks, underground and in deposits. It is a soft, shiny, yellow metal. |
| − | |||
| + | == Purity == | ||
| + | The purity of gold in a compound is measured in [[Carat|Karats]], with 24 karats being pure gold. 18 karat gold is three quarters gold, one quarter other [[elements]], and so forth. Gold is usually in alloys because it is soft and pliable. | ||
| + | |||
| + | == Value == | ||
| + | Due to its characteristics being both resistant to oxidisation and rarity on [[Earth]], gold is seem as very valuable. Gold is the basis for a monetary standard used by the International Monetary Fund (IMF) and the Bank for International Settlements (BIS). Gold is currently in excess of $1400 per [[ounce]].[http://goldprice.org/gold-price.html] | ||
| + | |||
| + | == Uses== | ||
Because gold is highly conductive and very resistant to [[oxidation]], it is vital in electronics. Gold plating is used on switch contacts, printed circuit boards, and device leads. There is enough gold in electronic devices to make it worthwhile to process discarded devices in order to reclaim the gold in them. | Because gold is highly conductive and very resistant to [[oxidation]], it is vital in electronics. Gold plating is used on switch contacts, printed circuit boards, and device leads. There is enough gold in electronic devices to make it worthwhile to process discarded devices in order to reclaim the gold in them. | ||
Revision as of 00:54, April 15, 2011
| Gold | |
|---|---|
| Properties | |
| Atomic symbol | Au |
| Atomic number | 79 |
| Atomic mass | 196.96655 amu |
| Other Information | |
Gold is a chemical element. It is a precious metal which has been used as money. Gold is found in nature as nuggets or grains in rocks, underground and in deposits. It is a soft, shiny, yellow metal.
Purity
The purity of gold in a compound is measured in Karats, with 24 karats being pure gold. 18 karat gold is three quarters gold, one quarter other elements, and so forth. Gold is usually in alloys because it is soft and pliable.
Value
Due to its characteristics being both resistant to oxidisation and rarity on Earth, gold is seem as very valuable. Gold is the basis for a monetary standard used by the International Monetary Fund (IMF) and the Bank for International Settlements (BIS). Gold is currently in excess of $1400 per ounce.[3]
Uses
Because gold is highly conductive and very resistant to oxidation, it is vital in electronics. Gold plating is used on switch contacts, printed circuit boards, and device leads. There is enough gold in electronic devices to make it worthwhile to process discarded devices in order to reclaim the gold in them.
Gold was one of the three Gifts of the Magi, along with frankincense and myrrh.[1]
Gold is also used in jewelry. However, the New Testament instructs Christian women not to wear gold or pearls.[2] Other uses of gold include aerospace, awards, bullion, coinage, computers, currency backing, dentistry, electronics, glassmaking, gold gilding and gold leaf and medical. [3]
References
| Periodic Table of the Elements | ||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | |||||||
| *Lanthanides | ||||||||||||||||||||||||
| **Actinides | ||||||||||||||||||||||||