What are the characteristics and important uses of money?
Chemists classify the money as both a metal transition and a precious metal. The precious metals are not very abundant in the crust. They are attractive and not very active chemically. These properties make the desirable metal jewelry, coins, and art. About a half-dozen nearby metal money in the periodic table are also precious metals. These include gold, platinum, palladium, rhodium, iridium.
The money has been used by humans for thousands of years. It often occurs as a free element in nature. It can also be extracted from its ores fairly easy. These properties, it was easy for early humans to learn more about money. Today The most important use of the money is in photography. Three silver compounds are used in photography silver chloride (AgCl), bromide Silver (AgBr) and silver iodide (AgI). Money is also used to manufacture electrical equipment, mirrors, medical and dental equipment, and jewelry. It is often used to make alloys of gold for some of these applications.
Silver was probably discovered after gold and copper both that occurs as part free in nature. They have very specific colors, which makes it easy for early humans to find these metals. Silver also occurs as a free metal, but much less often than gold or copper. At one time, man has learned to extract silver from its ores. But this discovery must have occurred very early in human history. Archaeologists have found silver objects dating from around 3400 BC in Egypt. Drawing on some of the oldest pyramids shows men working with metal, probably the extraction of silver from its ores.
Other cultures also used early money. Documents writings from India describe the metal as far as 900 BC Silver was commonly used in the Americas when they first Europeans arrival. The Bible contains many references to money. The metal was used as a means of payment for items. He also decorated temples, palaces and other important buildings. The Bible also contains sections that describe the manufacture of money. The word money back at least to the 12th century AD, it seems to come from an old English word used to describe the metal seolfor. The symbol of silver (Ag), however, comes from its Latin name, argentum. This name may come from the Argos Greek word meaning "bright" or "white." Money is a soft, white with a shiny surface. It is the most ductile and malleable metal. Money has two other unique properties. It conducts heat and electricity better than any other element. It also reflects light very well.
The Silver is very inactive. It does not react with oxygen air in normal circumstances. It reacts slowly with sulfur compounds in the air, however. The product of this reaction is silver sulfide (Ag2S), a black compound. The discolouration that develops over time on the silver and other objects in silver is silver sulfide. Silver does not react easily with water, acids, or many other compounds. It does not burn, except that the silver powder.
Money is a relatively rare element in the crust. Its abundance is estimated at about 0.1 parts per million. It is also found in seawater Its abundance it is considered as the order of 0.01 parts per million. Silver usually occurs in association with other metal ores, especially those of lead. The most common ores of silver are argentite (Ag2S); cerargyrite, or money "horn" (AgCl); proustite and pyrargyrite. Main silver producers worldwide are Mexico, Peru, the United States, Canada, Poland, Chile and Australia. In the U.S., money is produced Some 76 mines in 16 states. The largest state producers are Nevada, Idaho and Arizona. These three countries account for about two-thirds of all silver mined in the United States.
Two naturally occurring isotopes of silver: silver and silver-107-109exist. About 16 radioactive isotopes of silver are also known. No radioactive isotopes of money has any commercial use. Ores rich in silver have disappeared since periods because of mining. Today, the money usually comes from ores that contain very small quantities the metal. These amounts may vary from about a few thousandths of an ounce per ton of ore 100 ounces per ton. The metal is most often a byproduct operations for other metals. After the primary metal was removed, the wastes often contain small amounts of money. These wastes are treated with chemicals that react with the money. The money can then be extracted by electrolysis. Electrolysis a process by which a compound is broken down by an electric current through it. A small percent of silver produced in the United States is used for parts. The former "Peace" Silver Dollar, presented here, was struck from 1921 to 1935.
Approximately 10 per cent silver produced in the United States is used in coins, jewelry and artwork. One way the money is used in alloys with gold. Gold is highly sought for coins and jewelry. But it is much too soft to be used in its pure form. Adding silver to gold, however, is an alloy that is much stronger and more durable. More Gold items today are made of alloys, often silver alloy and gold. Other objects use much more of silver, however. The second most important use of the money is in electrical equipment and electronics. About 20 percent of all silver produced is used for this purpose. Money is indeed the most desirable of all metals for electrical equipment. Electricity flows through more easily than the money made through any other metal. Most cases, however, metals such as copper or aluminum are used because they are cheaper.
Take a photo depends on an idea simple chemicals: the light can cause electrons to move. Here's what it means. silver metal combines with chlorine, bromine and iodine to form compounds. In this reaction, each silver atom loses an electron to a chlorine atom. The silver atom becomes "an electron short "of what he normally. The silver atom with one electron is called a short-silver ion. photographic film is coated with a thin layer of silver chloride, silver bromide or silver iodide. This means that the film is coated with silver ions many. The silver ions are colorless, photographic film so has no color to it.
What happens when a photographic film is exposed to light? Light provides the energy of electrons in the photographic film. Some of these electrons find their way back to silver ions, which reduces them to atoms. But silver atoms are not colorless. They were black. Thus, a photographic film exposed to the light turns black with each point where the light strikes a silver ion. By taking a picture, of course, not every movie gets the same amount of light. An image of a person, for example, has areas that receive much more light than others. Thus, some locations on the film becomes places very dark, and others are less gloomy. Additional measures are needed to "develop" a photographic film or produce a picture of it. But the first step in taking a photograph evolves Return silver ions to silver atoms with light.
But sometimes electrical equipment is so important that the cost is not a consideration. For example, electrical devices on spacecraft, satellites and aircraft must operate reliably and efficiently. The cost of using money is not as important as it is in an appliance. Thus money is used for electrical wiring and connections in these devices. In some cases, the veneer of money can solve a problem practice when the money more expensive the better. Silver plating is the process by which a very thin layer of silver is fixed on top of another metal. The money is so malleable that it can be hammered into thin sheets a sheet of paper. Silver can be applied this thin to another metal. Then, the metal takes on some other properties of the silver layer. For example, it can very well function as a reflector, because the money is a good reflector. It does not matter if the second metal is a good reflector or not. The silver coating serves as the reflecting surface in the combination.
Approximately one fifth of all silver products used in a variety of other products. For example, it is often used in dental amalgams. amalgam of silver work well for filling decayed teeth. They are nontoxic and do not break down or not react with other materials very easily. The money is also used in specialized batteries, including silver-zinc and silver-cadmium batteries. Electricity flows through the money more easily than do any other metal. Money is a slightly toxic. When the metal or its compounds get on the skin, they can cause a bluish appearance called argyria or Argyros. The inhalation of silver dust can have serious effects on health in the long term too. Maximum exposure recommended for silver dust is 0.1 milligrams per cubic meter of air.
About the Author
Dr. Badruddin Khan teaches Chemistry in the University of Kashmir, Srinagar, India.
Coin shuffle (12×2 5 groszy coins).
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