Silver is one of the ancient found that the metal. Silver in nature although the existence of a single, but the majority are compounded in the form of state.
silver is a beautiful white metal, and its English name from the Sanskrit, meaning that light-coloured.
silver with high scalability, it can be rolled into only 0. 00003 cm thick transparent foil,a g Heavy silver tablets can pull into about two kilometers long filaments.
silver and thermal conductivity of the metal in the forefront. Yinsi great sensitivity can be used to create the physical equipment components; various relay important point of contact in the joints is to use silver to do, radio systems in the important components in the welding must also make use silver solder. Various automation devices, rockets, submarines, computers, nuclear installations and communications systems, all of these devices have a large number of contact points. In the use of the period, each point of contact to work million. To be able to withstand such strict requirements for the work, point of contact must wear and reliable performance, but also must be able to meet many special technical requirements. These general point of contact is made with silver, people are willing to use silver, because it can meet all the requirements. If the silver in the rare earth elements to join, the more good performance. And rare earth elements in this production of silver contact point, life can be extended several times.
silver nitrate see light on the decomposition of organic matter or event to silver. If silver is a very small particles on the black Chenghui. Such compounds are used in manufacturing or other silver plated silver compounds, but also the production of photographic negatives of the major photographic materials. Silver nitrate with different concentrations, can play a convergence, sterilization or corrosive effect. Bar-jung with silver nitrate solution can be concentrated its excessive corrosion proliferation of granulation tissue, dilute solution can be used for treatment of eye conjunctivitis.
silver oxide easily dissolved in ammonia, the solution home after a long time, sometimes explosive precipitated a strong black crystal. Silver oxide in the glass industry in the coloring agent used.
photosensitive silver bromide, used to make photographic negatives of the photosensitive layer.
Element title: silver
atomic weight elements:
elements 107.9 type
metal found:found that the
Process in ancient times, humans have a knowledge of silver. Silver and gold, is a long history of the precious metal, has been 4000 years of history. As silver unique characteristics of the fine, people have entrusted to it and decorated double the value of the currency, the pound and China before liberation by the silver dollar, silver is mainly to the silver and copper alloy.
Silvery white, shiny bright and gentle, in the minority, Buddhism and Islam were favorite decorations. Silver jewelry is presented to the people of all nationalities newborn baby gift of choice. Recently, people in Europe and the United States under the influence of old ideas, wearing black-oxidation of the silver inlay light blue turquoise jewelry, bring the ancient civilization of Xiasi infinitely bright. In China, silver jewelry has also become a modern women's fashion hot choice. Ancient Silver is already aware of one of the metal. Silver than the lively, although it in abundance in the crust is golden about the 15 times, but it rarely in a single state of existence and thus it was found than the night. In ancient times, people already know exploitation of Silver Mine, because when people get the silver is very small, making it than the value of your gold also. BC, 1780 1580 between Egypt dynasty Code provides that the value of the Bank of the 2 times, or even to the 17 century, the Japanese gold, silver or the value of the same. The earliest silver ornaments and utensils used to do, but only as a currency.
silver is a beautiful white metal, silver chemical symbol Ag, from its Latin name Argentum, is shallow" Color, bright" mean. It is the English name Silver. Silver is of high scalability, can be rolled into only0.00003 cm thick transparent foil,1 g heavy silver tablets can pull into about2 km the Filaments. Silver and the thermal conductivity of metal in the top.
-Quality silver
silver is a beautiful silvery white metal, it has a very good scalability, its electrical conductivity and heat transfer in all of the Metal and China are the highest. For example, if the conductivity of the Mercury for a is the conductivity of copper for 57 and the conductivity of silver to 59 of the first. Therefore, the silver used to produce very high sensitivity of physical equipment components, various automation devices, rockets, submarines, computers, nuclear installations and communications systems, all of these devices in a large number of contact points are made with silver. In the use of the period, each point of contact to work million, must wear-resistant and reliable performance, can withstand the strict requirements for the work, silver can meet various requirements.
in all metals, silver reflective of the natural light of the best performance, therefore, the silver-industrial system occupy a very important position.
addition, the silver ions to sterilization. The vicinity of herdsmen in Inner Mongolia of China's popular Yin Wan-sheng Manai, can be placed without long-term will become acid. Silver
the characteristics of a few for the +1, its chemical properties worse than copper, at room temperature, even when not heating water and oxygen in the air, but A long time in the air can buy black and white silver lost luster, it is because silver and in the air, H2S Synthesis of black Ag2S because.
4Ag + H2S + O2 = 2Ag2S + 2H2O
silver can not be diluted hydrochloric acid or dilute sulfuric acid reaction produce hydrogen, but silver can be dissolved in nitric acid or sulfuric acid concentration in the heat of
Heating: 2Ag + 2H2SO4 strong) ==== Ag2SO4 + SO2 ↑ + 2H2O
silver at room temperature and the halogen response is slow, in the heat under the conditions that Can generate halide
473 K2Ag + F2 ===== 2AgF dark brown
heating 2Ag + Cl2 = ==== 2AgCl ↓ white
Heating: 2Ag + Br2 ===== 2AgBr ↓ yellow
heating: 2Ag + I2 ===== 2AgI ↓ orange
Bank of sulfur have a strong affinity potential, and sulfur heating can direct synthesis of Ag2S
Heating: 2Ag + S ==== Ag2S
elements described
silvery white metal. Density: 10.5 grams cm 3. Melting point:961.93 ℃, the boiling point2213 ℃. Valence +1. Fu scalability, is the thermal conductivity, good conductivity of the metal. The first ionization energy 7.576 e-V. Chemical properties of stability, water and oxygen in the atmosphere are non-functional; soluble in dilute nitric acid, heat the concentrated sulphuric acid and hydrochloric acid, molten hydroxide base.
Elements are the main source of
Silver Mine-Silver Mine, followed by the angle mine, but also natural silver. By the Silvermine and salt and water were hot, with the combination of mercury-silver amalgam, steamed to mercury derived from silver. Or from Silvermine to cyanide leaching bases added to lead or zinc and silver precipitation in the system.
Elements of the system for use
alloy, solder medicine, silver foil, silver, chemical equipment, and used the system at the end of silver coins and silver, and so on.
Elements supporting information
silver in nature rarely in a single state of existence, most of them compound, and thus it was found the night than is generally believed that Away in the 5500-6000 year.涅克拉索夫"General Chemistry Guide" also talked about the natural silver, has found that the largest block silver heavy 13.5 tons.
most of the natural silver and gold, Gong, antimony, copper or platinum-alloy, natural and almost always a small amount of gold into silver alloy. China's ancient known amber gold, in English known as the ELECTRUM, is a natural gold, silver alloy, silver-containing about 20 percent. As the first people to get the silver is very small, making it than the value of your gold also. In about 1780-1580 BC, dynasty in Egypt between the Code provides that the value of silver is the double. Even to 17 century, silver and gold in Japan or the value of the same. Marx in "Critique of Political Economy," referred to in: "…… silver mining and mine is to work and generally high level of technological development as the prerequisite. Thus, while silver is not so scarce, but its initial Value is relatively larger than the value of the "
to 13-14 century, China and Europe have blown ash from the development of testing gold, silver. This is also a separate gold, silver in the way of impurities, also known as baking bowl metallurgical law. This method is to be tested gold, silver or collected samples of gold, silver at the animal's ashes into the legacy of heating, lead and other impurities forming oxides, part Chuiqu blast, some infiltration of ash , Is not left of the gold and silver. This can be calculated in the sample or the gold-bearing ore, and the purity of silver. This approach has been also used in analytical chemistry.
silver in ancient China known as the platinum. Western ancient people used symbols to express the moon silver, English, " silver" is argentum, from the Greek argyros (bright). Therefore, silver is the chemical element symbols Ag.
Moon-like metal- silver
silver, never shined as a brilliant moon, silver paper intent, which is the "Bright" mean. Bank of China also used the word to describe the white and shiny things, such as the Milky Way, ginkgo, sweet fish, Tremella, and so on the screen.
ancient China often tied to silver and gold-copper, known as the CD" Sanpin"。 "Yugong," a book will be recorded in the CD" that our Sanpin", as early as the 23 century BC, that is now more than 4,000 years ago found a silver. In nature, silver often in the form of silver, people will have to find a weighing 13.5 tons of pure silver! In addition, chloride and to have existed in the form of SULFIDE, often with lead, copper, antimony, arsenic and other minerals coexist together.
silver conductive skills, the metal in the first few. Some pocket-sized radio used for the silver wire. Silver is also very scalable.
The vicinity of herdsmen in Inner Mongolia in China, commonly used Yin Wan-sheng Manai, the same can be stored for a long time and acid. According to the research, which is due to a very small amount of silver to silver ions in the form of insoluble in water. Silver ions to sterilization,只消litre water containing一千亿分之二grams of silver ions, would be sufficient so that the majority of bacterial death. Ancient Egyptians more than 2,000 years ago, has also been aware of the silver-covered in wounds, sterilization. And now, people with a silver" silver silk gauze bandaging wounds", door, used to treat certain skin trauma or refractory ulcer.
silver will not be directly combined with oxygen, the very nature of the chemical stability. It is strange that 1902 in 2, in the vicinity of the Latin American Martini on the island of Cuba, silverware within the next few days are the black. Later identified, the original volcanic eruption, the volcano contains a small amount of hydrogen sulfide gas, and its role in generating black-silver sulfide. Normal in the air and also contain traces of hydrogen sulfide, therefore, put silverware in the air for a long time, the surface will be gradually dimmed, blackening. In addition, the air mixed with small amount of ozone, and it can also direct role in silver, black generation of silver oxide. Because of this, the ancient silverware to the present, the surface is not as ancient gold so bright. However, with 30 percent of palladium silver palladium alloys, the case of hydrogen sulfide is not black, is often used to make dentures and accessories.
silver in dilute hydrochloric acid or dilute sulfuric acid, will not be corrosion. However, the heat concentrated sulphuric acid, concentrated hydrochloric acid to dissolve silver. As for nitric acid, can dissolve silver. However, silver can be alkaline, so in the chemical laboratory, melting potassium hydroxide or sodium hydroxide, commonly used silver crucible.
silver and gold, the metal is in" nobility", known as the precious metal", the past only" To be used as currency and making decorations. Now, silver in the industry have three important purposes: electroplating, and system-photography.
in a number of easily corroded the metal plating on the surface layer of silver, can be extended life and beauty. Silver plated, silver to the cathode, the anode plans for the workpiece 34), but not the direct use of silver nitrate solution as the electrolyte, because this silver ion concentration is too high, plating speed, Silver deposition quickly, boost the silver plating is very loose, easily falling into a film. Usually in the electrolyte by adding cyanide, as cyanide ion with silver ions form complexes, reducing the solution of silver ion concentration and reduce the negative silver deposition rate and improve the quality of the plating. With the presentation of a silver, silver ions in the electrolyte concentration decline, when the silver cyanide Tongxinluo ion dissociation, continuously transported to the silver ions in the solution so that the solution of silver ions to always maintain a certain level. However, the highly toxic cyanide, is a big drawback.
glass mirror silver Guang Shanshan, which is also back in uniform with a silver plated. However, the silver plating is not used by plating boost, but with" silver-plated" boost the response: the ammonia solution of silver nitrate and glucose solution inverted with a glucose Reductant system now also useful plant-formaldehyde, ferrous chloride for reducing silver nitrate, it can restore the silver metal silver, precipitation in the glass and then made A mirror. Re Shuiping gall also silver Guang Shanshan, the silver plating is the same.
silver used in the manufacture photographic photosensitive materials, has special significance. Because of photographic paper, film Tuzhuo on the photosensitive agent, silver compounds are- silver chloride or silver bromide. Silver compounds these very light-flu. One of the light, they immediately the decomposition. Strong light of decomposition much light of the weak grip little decomposition. However, when the" like" is only vaguely visible, must go through profiling, to make it clear and stable. Developers, and then after fixing and get rid of photographic film on the extra silver chloride or silver bromide. Like the film, and the real On the contrary, called negative light of the strong, silver chloride or silver bromide much decomposition, black deep film on black metal thing is fine silver, Light and weak, however, some of it white. In India the photos, the black-and-white photograph and negative On the contrary, then the color and consistency of the real. Modern Photography technology has been weak in the light of the match, in a few one-tenth of 1 percent to a few seconds in the sold very clear photos. Today, the world each year for photographic film and the cause of silver, has reached 150 tons.
silver is the most important compounds of silver nitrate. In the medical, the solution of silver nitrate used for eye drops, because the silver ions to kill bacteria can be strong.
prices in general about 70 yuan grams purity of the 999
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