Characteristics features copper metal

Metal Slug is currently include many of the alloy which is composed mainly of copper, tin and other metals in small proportions, the most important zinc, tin and metals such as ammonium and phosphorus.
Among the most important mechanical properties.
- It was originally made of copper and more tolerant and add small percentages of tin is about 4% increase hardness. If, however, increased the percentage of 4%, the resulting alloy becomes brittle and easily breakable and, if not Tldenha.
The ancient Egyptian knew how to overcome these problems, the thermal Baltlden. So it was bronze fittest of copper for the manufacture of cutting machines such as chisel, axes and knives in addition to weapons and fighting tools such as swords and daggers.
- The melting point of copper decreased by the addition of tin to him it is known that the melting point of copper 10 835 m in the melting point while the bronze alloy drops to 960 17:00 for Skibbe composed of 85% copper, approximately 15% of the tin. While the melting point of tin alone 2325 m in the. And possible replacement to the melting point of the alloy of tin, if I knew of curves showing the relationship between the installation of the alloy and the degree of fusion and call that curves as Turi

The alloy.
Molten bronze and more liquid than the molten copper.
The molten copper more viscous than the molten bronze.
Therefore it is easy to be formed where the bronze is easier in the casting process. These are the features that led to the transition to a bronze in the Egyptian statues as pure copper metal does not fit as a casting.
- Bronze does not shrink when converted from the case of fusion with a hard case, but on the contrary increase its size a little bit so it is the fittest of copper in casting operations because after sclerosis takes forms or on the template minute details while copper Bankmach and freeze leaves many of these details.
- Bronze gas is not absorbed is hot when it cools down and ask, where the presence of tin prevents the absorption of oxygen and other gases, which sets it apart from copper metal. Therefore, we find that the bronze statues considered to be free of gas bubbles, unlike copper statues.

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What is Gold?

What is Gold?
Gold is a very precious metal and a chemical element that has the symbol Au and atomic number 79 in the periodic table. The so-called natural his condition before hitting by gold dust, a soft yellow color and shiny, use as a criticism when many peoples and civilizations and nations, as it is used in jewelry and gems industry. Resides in the nature of the granules body within the rocks in the river bottoms, or in the form of veins in the ground, and often there is gold with other metals such as copper, lead, and discovered the largest mass of gold in Australia in 1896, he weighed 2,280 an ounce, and the advantage of gold lack of corrosion and softness it is also one of the most density of chemical elements. And gold have existed in abundance when the Pharaohs And they make him the coffins of their kings and their vehicles as they made him a mask of the most beautiful masks known to mankind was made of pure Pharaoh Tutankhamun's gold. And is a gold monetary base used by the International Monetary Fund (IMF) and the Bank for International Settlements (BIS) also went to other Astamlat is used in dentistry and electronics.

. The reason for the high price of gold metal?

Historical reason he used gold in civilizations in large unit exchange spend and thus become a way to store the economic capabilities.
Scarcity of gold and can not be manufactured. Gold is the only metal which is characterized by unique characteristics.
Increased demand for jewelry gold ornaments and make savings instrument by traditional and basic in some communities.
 Global States shall take the gold bullion as a storage media in the economic reserve.
3. uses of Gold: The unique characteristics of gold of the Aonth and its ability to drag and configuration, and its resistance to corrosion, made it suitable for many purposes it is mixed with other metals such as copper, silver or nickel for a more durable alloy, with the platinum enters in the manufacture of industrial IAF Being highly resistant to separate chemicals, the gold is the preferred metal in many fields such as:

Ornamental jewelry: many use gold in ornamental jewelry known as yellow gold, this is done by mixing gold with copper, silver and zinc in varying proportions resulting in shots multi-gold, are measuring the degree of purity of the gold parts (part of the millennium) or Bayar according to the American standard, for example, the degree of purity in 1000 met 24-caliber, degree of purity, 875 correspond caliber 21, while 750 matched the caliber 18, and generally, the color tends to paleness whenever you lose caliber any number decreased the amount of gold in the alloy. The white gold is gold mixed with tin or palladium in order to impart the color white and white gold usually used for jewelry kits
In medicine: It is used in dentistry due to Aonth and its resistance to corrosion in the mouth. Gold solution is also used in the treatment of arthritis and inflammation of the bone. Gold is used radiocarbon (198) in the treatment of some types of cancer.
Investment: Many gold holders store it in the form of ingots or in the form of coins as a hedge against inflation or other economic disruptions. However, some economists do not believe that gold as a hedge against inflation or currency devaluation.
Food and drink: the use of gold in nutrients and contains a number E 175. The use of gold leaf, some foods and desserts, particularly gourmet, drinks decorative component.
Industry: Gold is used to join the elements of high-temperature gold jewelery for welding steel or brass. If used in the stamp of quality. It also is used on high-end cylinders reflective layer

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Tourmaline (Tourmaline) And Coral (Coral)

Formalin of boron silicate and other elements such as potassium, sodium, aluminum, iron, lithium, magnesium consists (BO3) 3 (Si, Al, B) 6O18 (OH, F) 4
). The color is

determined by the type of impurities Tourmaline covers a wide spectrum of colors of black, brown, red, yellow, blue and others.

Coral is one of the types of plants that grow in the rocky bottoms of some of the sea but Gsouna fossilized with red color is mostly dark. Coral consists of membership contain large amounts of calcium carbonate material and grow this article in the form of a red color spicules minutes secreted by coral plant. The main colors ranging from white coral color, pink, dark red, a color often.

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Pearl (Pearl)

  Pearl is made as a result of the secretion of organic materials Kalkounkeulen (conchiolin) and inorganic Kalcalcet (Alcaliswm crystalline carbonate (CaCO3)) inside the shells of

some types of mollusks and shellfish where Pearl secretion in the form of successive layers around a foreign body threaded like sand. Grain and natural pearls in her mostly smooth spherical shape but can take other Ohcla Kmufltah and Almtaul. The pearl white colors Vochehrha various levels, silver, but may take the black, red, blue and other but they are rare. It features a distinctive pearl Blamaanh who is credited with a pearl luster which results in reflection and refraction of light from the multi-layered pearl bead.

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Amber or amber (Amber)

 Amber or amber consists of resin (resin), which was produced by some types of trees millions of years ago and

then congeal underground layers as a result of pressure and heat Highs. And graded amber color in the habit of yellow to dark yellow and has a spherical shape or in the form of irregularly shaped blocks. Amber and crisp installation and issue a flame when burned bright and smell. There are sometimes bitten types of insects extinct and non-extinct packaged in amber samples.

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Phosphorus

Phosphorus [4] a chemical element in the periodic table, chemical symbol P and atomic number 15. enters in the composition of all living cells, because of their chemical activity is not found in nature freely.

This German element Hennig Brand discovered it in 1669
Phosphorus record drip solid yellow waxy texture severe flammability and safe way is to be underwater and if this kind Preheat of phosphorus called white phosphorus or yellow in a closed vessel at a temperature of 250 ° C almost it turns into a red powder called phosphorus Red, which is less susceptibility to infection and can be traded more safely, which is less toxic to a large extent and when heating phosphorus under pressure produces black phosphorus.
Phosphorus large Dhumal to interact, which is not found in nature in racism case, but it is present in many types of rock in the form of phosphate and arranged atheist ten among the most familiar elements of the core of the earth's crust and is a calcium phosphate are minerals months that extract large quantities of mines to be used Km_khasb of the soil and the phosphate Alcaliswm The bulk of the weight of the bones and phosphorus is essential for life, and there are trace amounts of it in all living tissue.
Phosphorus is used in the manufacture of certain types of bronze called Bronze phosphoric These are used mainly as barriers to friction in machines in sulfur sticks industry where it is used red phosphorus, sulfur sticks industry because it is safer after that was used white poisonous phosphorus is also used phosphorus chemicals as for the preparation of many types of pesticides .

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Molybdenum

Molybdenum chemical element in the periodic table. His character is Mo and atomic number 42.
Molybdenum chemical element and solid metal silvery white

chemical symbol Mo. The high degree of melting of up to 2,617 ° m makes it one of the strongest and most refractory metals used. When alloyed (mixed) with steel, molybdenum metal gives strength and stiffness, especially at high temperatures, and it also increases the thermal and chemical resistance of certain metals with a basis Nchaeli when mixed with it. Molybdenum is used in the manufacture of aircraft and missile parts, and is an important element in plant nutrition. And molybdenum compounds for many industrial uses, especially adjuvant (catalysts) in oil refining, in addition to the use of molybdenum disulfide lubricant mitigating friction at high temperature under conditions where most of the oils decompose. And molybdenum oxide is used in the steel industry, which does not rust for making the number of workshops. There molybdenum metal in Almoulibdnit and some other metals. This chemical element discovered Carl Wilhelm in 1778. The atomic number of molybdenum 42 and the atomic weight of 95.94 and a boiling point of 4,612 ° m.

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