i have a small world

As we all know, the human eye cannot look directly at the sun for a long time. Once the human eye looks directly at the sun for a long time, the eyes of the person will be burned by the sun. Slightly, it is just that the eyes feel uncomfortable. , It will be fine after a while, but in serious cases, it will directly lead to blindness of the human eye. ∈♀ Vertex Fiction,

The sun is a celestial body that can emit extremely strong light. If you observe it directly with the naked eye, your eyes will be burned by the strong sunlight.Just like using a convex lens to gather sunlight can ignite a match or burn through a newspaper, if you don’t add any protection, staring at the sun for 20 seconds with the naked eye is enough to cause thermal damage and photochemical toxicity to the retina, leading to solar retinal burns, and severe eye damage. Sexual blindness.

Why did Leng Xin look directly at the sun regardless of the damage to his eyes?This is all because Leng Xin just saw the golden light in the sunlight.

When people's eyes look at the sun, there will not be any golden light, but at that time, there was a golden light in Leng Xin's eyes, so Leng Xin was convinced that he had found the dog's head gold.

The sun does not shine golden light, but the gold illuminated by the sun will shine golden light.Now that Leng Xin's eyes saw the golden light, it doesn't mean that he found gold.

That's why Leng Xin ignored the damage to his eyes and looked directly at the sun. He was looking for the golden light that he had just seen. It should be Leng Xin's luck. After only four or five seconds, Leng Xin After confirming the place emitting golden light, Leng Xin ran directly in that direction.

Unfortunately.The world is unpredictable, when Leng Xin came to the place that exudes golden light.Leng Xin didn't find any dog's head gold at all, even if Leng Xin had been digging here for a long time.I didn't find any dog ​​head gold, the only thing I had was this huge rock in front of me.

The rock in front of Leng Xin, he was sure that it was definitely a part of the mountain, because Leng Xin wanted to dig out this rock just now. It's tall, so Leng Xin wanted to dig it out, but it's a pity.No matter how Leng Xin dug, he couldn't dig out this piece of gold ore.

This piece of gold ore is too big. Leng Xin dug a full five meters deep, but he still couldn't see the bottom of this piece of gold ore. Moreover, the more Leng Xin dug down this piece of gold ore, he found this piece of gold ore The volume of the body became bigger and bigger. At this time, Leng Xin realized it.It turned out that the rock with a head protruding from it was actually a part of the rock.

It is completely impossible for Leng Xin to dig out this 'rock'.Besides, even this piece of gold ore only has the current volume.Leng Xin is helpless now.

The density of gold is very high, therefore, the weight of gold is also high.You may be able to move an iron block of the same volume, but if you replace it with gold.Then there is nothing you can do.The same thing applies to gold ore.

The exposed volume of this gold ore is very large.It is a full six meters high, and the widest part is now more than ten meters. How can Leng Xin move such a large piece of gold ore.

Even if Leng Xin came to move this piece of gold ore before he lost his martial arts, he still had that heart, not that ability!
Therefore, when Leng Xin realized this, he never had the idea of ​​moving this piece of gold ore away.Wanting to move such a large piece of gold ore away by hand, only a fool would do it. As a big brother who knows how to be black, Leng Xin, how can he be a fool.

"Tmd, such a big piece of gold is in front of me, but I can't move it, this is really, this is really..., tmd!"

Leng Xin scolded people angrily, the temptation of gold to people's hearts is really too great, you can know this by looking at Leng Xin's appearance now.

Leng Xin has been wandering around this huge gold ore now, his eyes are even more red, he was stimulated by this huge gold ore, and the whole person has fallen into the fantasy of getting countless gold.

Gold (English gold), commonly known as gold, chemical element symbol au, gold code xauusd is a metal with yellow luster.Gold has the characteristics of good physical properties, stable chemical properties, high ductility and scarcity. It is not only a special currency used for reserves and investment, but also an important commodity in jewelry industry, electronics industry, modern communication, aerospace industry and other industries. important material.

Gold is gold with the chemical symbol au, and gold is one of the rarest and most precious metals in the world.

Gold is the earliest metal discovered and utilized by human beings. Because of its rarity, specialness and preciousness, it has been regarded as the head of hardware since ancient times and has the title of "King of Metals".

Gold (English gold) is gold with the chemical symbol au.The English name is xauusd or gold, and gold is one of the rarest and most precious metals in the world.

Gold is the first metal discovered and utilized by human beings. Human beings have long been able to pick up this simple metal that reflects the dazzling yellow brilliance from nature.

Gold has been discovered and utilized by humans 10000 years ago. The history of human discovery and utilization of gold is thousands of years earlier than many common metals such as copper, iron, and aluminum that we are familiar with now.

The pure color of gold now has ten thousand pure gold (99.99% 100), thousand pure gold (99.9% 100) and pure gold (99% 100) since ancient times. -If-la aurora means the shining dawn, the ancient-Inca-people regarded gold as the sweat of the sun, the ancient-Egyptian Pharaoh insisted on burying it in the flesh of God, gold, the Bible- One of the gifts brought by the Magi of the East mentioned by Matthew-Gospel is gold, and the Bible-Bible Revelation describes that the streets of the holy city Jerusalem are made of pure gold.

About 5000 BC, they and silver existed in the metal layer of the earth's crust. With the decline of the Roman Empire, gold mining and production stagnated for almost 1000 years, until the Spaniards discovered the United States in 1492. In the 14th century, the Incas, who regarded gold as the sweat of the sun, conquered the Chimu Empire and ordered the Chimu goldsmiths to plate every inch of the wall of the Temple of the Sun with gold.

Driven by gold in the 15th century.Spain conquered the A-Z-T-K Empire and obtained a large amount of gold reserves from A-Z-T-K.In order to revive the Spanish economy, pizarro invaded Peru in 1531.Captured the Inca ruler Atahualpa, and immediately ordered to melt all the Inca gold and send it back to Spain. Strategic financial storage attributes.

Gold has a longer history of use than metals such as copper and iron. Humans have discovered gold in the Neolithic Age 10000 years ago.Because gold itself has good stability and rarity, gold has become a precious metal and is used as a wealth reserve by people.

Because gold has special natural attributes, it is endowed with social attributes, that is, currency functions.

Mark Ke-si wrote in "Capital-On": "Currency is not gold and silver naturally, but gold and silver are naturally currency." This is the investment attribute of gold.
Gold is the first metal discovered and utilized by humans.Humans have long been able to pick up this simple metal that reflects the dazzling yellow brilliance from nature.Gold has been discovered and utilized by humans 10000 years ago. The history of human discovery and utilization of gold is thousands of years earlier than many common metals such as copper, iron, and aluminum that we are familiar with now.

The reason why gold was first recognized by humans is determined by the special physical properties of gold. Gold can exist in the form of simple substances in nature, while other metals often exist in the form of compounds.

Gold can emit a noble and brilliant yellow luster under the sun. Gold means "dawn" in Latin and "touchable sun" in ancient Egyptian texts.

Gold is very precious because it is extremely rare, the cost of gold mining is very high, and many physical properties are very good.It has excellent stability and is convenient for long-term storage. These characteristics make gold particularly favored by human society. Gold has become an important part of the complex mechanism of human society.

Due to these special natural properties of gold, it is endowed with social properties by human beings.That is the currency function.Gold has become the material wealth of human beings and an important means for human beings to store wealth.

Marx-K-Si wrote in "Capital-On": "Currency is not gold and silver naturally, but gold and silver are naturally currency".

over the millennia of human history.Gold basically belongs to the wealth that can only be owned by emperors and nobles. Owning gold means a symbol of power.It is gold that makes the civilizations of ancient Egypt and Rome look strangely brilliant, among the major ancient civilizations in the world.Gold had a very high status in the society at that time;
In addition to being owned by emperors and nobles, gold is also generally considered by human society to be a fetish that can only be owned by gods. People dedicate gold to the gods they worship, and gold has become a special material for worshiping utensils and decorating and protecting the image of gods.

Physical properties of gold: Gold is a precious metal with a yellow luster, and it is one of the most precious and rare metals in the metal kingdom.

The atomic number of gold in Mende-Lev's periodic table is 79, and gold has good chemical stability. In the metal market, gold and ruthenium, rhodium, palladium, osmium, iridium, platinum, silver and other metals are collectively referred to as precious metals.

Gold has good physical properties. Its melting point is as high as 19.31 degrees Celsius. "True gold is not afraid of fire" means that gold is not easy to melt under ordinary flames; it has a high density of 46 grams per cubic centimeter, and feels heavy to the touch, with a diameter of only 1000. The weight of a pure gold ball is 1 grams. It has good toughness and ductility. 50 ounce of gold can be drawn into a 0.001-mile-long gold wire, and the gold can be rolled into a green gold leaf with a thickness of [-] mm. It is easy to cast and is a good choice for making jewelry; gold is a good conductor of heat and electricity, but it is not as conductive as platinum, mercury, lead, and silver; gold has very strong oxidation resistance, and the physical stability of simple gold is very good , so there is simple gold in nature; gold is easily ground into powder, which is why gold is dispersed in nature, and pure gold jewelry is also easy to wear and reduce its weight.

Pure gold can reflect a bright yellow color, and the color changes greatly after being mixed with other metals, such as gold-copper alloys are dark red, and silver-containing alloys are light yellow or off-white.

The steam emitted when gold is melted is green, and its gold powder is usually brown in color during the smelting process.If gold is made into thin gold foil, the gold will glow green when viewed from a bright place.

Physical properties of gold: 1. Color: The beauty of golden yellow can be compared with the sun.The steam that gold gives off when it is melted is green; its gold powder in the smelting process is usually brown; if it is cast in a thin sheet, it can transmit green light.

2. Ductility: exceptionally strong. One ounce of gold can be drawn to a length of 1 miles, and its ductility makes it easy to cast, making it a good choice for jewelry.Gold is the strongest of all metals.

3. Malleability: second to none.

Can produce extremely thin gold flakes that are easy to roll up. Gold weighing 1 ounce can be hammered down to 400/1 millionth of a foot thick and as large as 100 square feet.The ancients hammered it into thin slices to make decorations on temples and palaces.

It is said that 1 ounce of gold can be used to cover the roof of a house.If you have a chance to visit these ancient temples, pay attention or there may be free gold pieces falling on your head!
The color of gold is golden yellow with metallic luster and no cleavage.Hardness 2-3, pure gold 19.3, melting point; good ductility, can be pressed into thin foil.With extremely high thermal conductivity and electrical conductivity, pure gold is the best electronic conductor material.

As a precious metal, gold has good physical properties. "True gold is not afraid of fire" means that gold is not easy to melt under ordinary flames.High density and heavy hand feeling.Good toughness and ductility, good conductivity.

Pure gold has a bright yellow color, but the color changes greatly after being mixed with other metals, such as gold-copper alloys are dark red, and silver-containing alloys are light yellow or off-white.

Gold is easily ground into powder.This is also the reason why gold is scattered in nature, and pure gold jewelry is also easy to wear and reduce its weight.

The atomic number of gold in the Mende-Lev periodic table is 79, that is, the nucleus of gold contains 79 protons, and the protons are positively charged.at the same time.Because of the half-full rule, gold has good chemical stability.In the metal market, gold, ruthenium, rhodium, palladium, osmium, iridium, platinum and other metals are collectively referred to as precious metals.

Gold is a very soft metal, but not as good as lead and tin.Pure gold can be scratched with a fingernail, and this softness makes gold very easy to work with.However, this point is very unsatisfactory for the manufacturer of the decoration, because it is easy to scratch the decoration, make it tarnish and affect the appearance.

Therefore, when making jewelry with gold, copper and silver are generally added to increase its hardness.

Gold is easy to forge and ductile, and can be rolled into transparent and translucent green gold foil with a thickness of 0.001mm. 0.5 grams of gold can be drawn into a 160-meter-long gold wire.

Physical properties of gold: Gold is easily worn and turned into a very fine powder, so gold is often widely distributed in nature in a dispersed state.

Gold is a good conductor of heat and electricity, but not as good as the five metals copper, platinum, mercury, lead, and silver.

The melting point of gold is 1063c. Molten gold has high volatility. As the temperature rises, its volatility increases continuously.

The compressive strength of pure gold is 10kgmm2, and its tensile strength is related to the pretreatment method, generally between 10-30kgmm2.When the gold wire is cold drawn, the force is the greatest.

Pure gold has a very beautiful straw yellow metallic luster. It can be said that gold has the yellowest color among all metals.Pure gold is not found in nature, and metallic impurities, first of all copper and silver, give it a variety of colors and shades, from pale yellow to bright yellow-red.The color of gold also depends on the thickness of the metal block and its state of aggregation.

For example, very thin gold foil is green when viewed from a bright place, and molten gold is also of this color, while unmelted gold is yellow-green, and fine-grained dispersed gold is generally dark red or dark purple.

Native gold is sometimes covered with a film of iron oxide, in which case the gold can be brown, dark brown, or even black in color.

Gold can form alloys with many metals because the atomic radii of these metals are very close to those of gold; the atomic radius of gold is equal to 1.46 angstroms; bismuth 1.46 angstroms; silver 1.44 angstroms; platinum 1.39 angstroms.

Therefore, gold can form gold-silver alloys, gold-copper alloys, gold-platinum alloys, gold-palladium alloys, etc. These alloys are not compounds, but solid solutions.

All metals in the alloy have a lower melting point than their pure metals. If gold is heated close to the melting point, gold can be welded like iron, and fine gold particles can be fused into gold nuggets. (l Angstrom=0.0000000l cm)

Gold powder must be pressurized to be welded together when the temperature is low.

Gold is melted together with other metals.Not only can it lower its melting point, but it can also change the mechanical properties of gold itself.Containing silver and copper can significantly increase the hardness of gold; containing arsenic, lead, platinum, silver, bismuth, and tellurium can make gold brittle.The characteristics of lead in this respect are even more prominent, the alloy containing only 1% lead.If it is punched, it will be broken into pieces, and pure gold contains 0.01% lead, and its good malleability will be completely lost.

Gold has the ability to absorb x-rays.

Gold is included in the ranks of the compound, just like the noble metal group, it is very reluctant, but it can interact with certain elements after all.Especially with halogen (chlorine, bromine, iodine) compounds to form 13 and so on.

Gold also combines with cyanide, mercury, and tellurium.

In fact, there are only compounds of gold and tellurium in nature, and very few compounds of gold and mercury.

All other compounds are artificially produced."Regold" (au(nh)3(ch)3) can also be produced artificially. "Regold" is easy to explode when impacted or heated.

Gold, although difficult to dissolve, can still dissolve in some solutions.Small amounts of gold can also be dissolved in water containing chlorine, sulfuric or corrosive acids.In aqua regia, and in dilute cyanide solution, it dissolves in a large amount in ionic state.

The crystal of gold belongs to equiaxed crystal system.The crystal shape is often cubic or octahedral.When the crystals are melted and then condensed, they are irregular polygons.The slower the cooling, the larger the crystals.

Gold demand:
[-]. Demand for gold jewelry

When it comes to the demand for gold jewelry, the three countries and China can be said to be the biggest demanders, which has also created the super buying momentum of gold in the market.

Gold jewelry demand in the three countries accounts for the country's total demand.Maintained above 2005% before 80.However, with the high development of gold investment tools in recent years, the proportion of investment demand has gradually increased since 2006; investors who used to directly buy gold jewelry as investment tools have gradually changed to investing through etf and other forms.

But despite this, as of 2009 statistics show.Nearly [-]% of the gold demand in the three countries still comes from gold jewelry, which shows that the demand for gold jewelry is still one of the important factors driving the rise of gold prices.

In terms of global demand for gold jewelry, except for the impact of the financial tsunami in the first quarter of 2009.The global demand for each season falls between 400 and 700 tons.And if we look at the demand in each quarter of each year, we can find that the second half of each year is usually the peak of gold jewelry demand.This again reflects the seasonal demand of China and Afghanistan.Driving the demand momentum of global gold jewelry.

[-]. Industrial demand

The industrial demand for gold is mainly used in the electronics industry and the medical industry, while the electronics industry continues to rise.It also makes the electronics industry the largest source of industrial demand.

In recent years, the electronic industry is changing with each passing day, and electronic products have more and more functions, and the requirements for stability are also getting higher and higher.Because of its high ductility, anti-corrosion and anti-rust properties, gold has high stability that cannot be replaced by other metals.In addition, gold is also widely used in the aerospace field due to its high temperature resistance and corrosion resistance.

As for medical treatment, the chances of gold being used in dentistry are quite high, and gold is really everywhere in our lives.

[-]. Investment needs

In the era when financial markets and financial investment tools were still underdeveloped, the main form of gold investment was through gold bars and gold coins.

However, in recent years, with the vigorous development of the financial market and the rapid popularization of gold futures and gold etfs, investors all over the world have begun to enter the "crazy gold" investment model, so that gold is no longer just a gold ornament for viewing. More importantly, it also has the functions of simple and rapid investment and value preservation.

In addition to value preservation, it also has a deep value-added function, which has also driven the investment demand for gold to rise sharply in recent years.

If viewed from the perspective of demand, it is not difficult to speculate that the main factor for the current rise in gold prices has changed from the demand for gold jewelry in the past to the investment demand for gold, and the eagerness of investors to invest is even more obvious.

The fastest growing part of investment demand is the gold etf listed on the exchange.

The “gold jewelry demand” and “industrial demand” that everyone was familiar with in the past have changed their roles to become low-cost buyers of gold prices, because for China and Afghanistan, the demand for marriage and festivals is still a major event in life;
When there is a pullback in the price of gold, the next level of physical demand buying will enter the market to undertake.It also allows the current gold price to continue to stand near historical highs.

Under the promotion and support of these three forces, this wave of bullish trend of gold has been created.

Analysis of the texture of gold: Cooked gold is gold that has been smelted and purified from raw gold.Generally, the purity is higher and the density is finer.Some can be directly used in industrial production.

The common ones are gold bars, gold nuggets, gold ingots and various ornaments, utensils, gold coins, and industrial gold wires, gold flakes, gold plates, etc.Due to different uses, the fineness required is different, or because there is no purification equipment, it is only melted without purification, or the purity of the extraction is not enough, forming gold with different fineness.

People customarily classify cooked gold into three types: pure gold, red gold, and colored gold according to the level of fineness.Gold that has been purified to a relatively high purity is called pure gold, and gold generally refers to pure gold with a fineness of more than 3%.

Red gold and pure gold have similar meanings, but due to differences in time and place, the standards of pure gold are different.The gold sold in the international market is called red gold with a fineness of 99.6%.The pure gold in the territory is generally between 99.2% and 99.6%.

Color-gold, also known as "sub-gold" and "tide gold", refers to gold with a lower fineness.Due to the different content of other metals, the fineness of these golds is as high as 99%, and that as low as 30%.

According to the different types of other metals, cooked gold can be divided into clear color gold, mixed color gold, k gold and so on.

Clear gold refers to gold that is only mixed with silver, regardless of its fineness, it is collectively referred to as clear gold.Clear gold is more common in gold bars, gold ingots, gold nuggets and various utensils and gold ornaments.

Mixed-color gold refers to gold in addition to containing silver.It also contains copper, zinc, lead, iron and other metals.According to the type and amount of metal contained, it can be divided into small mixed gold, large mixed gold, bronze mixed gold, lead-containing mixed gold, etc.

Karat gold refers to the gold that is made of silver and copper in a certain proportion according to the formula that pure gold is 24k.Generally speaking, the higher the proportion of silver in K gold.The greener the color; the larger the copper content, the purple-red the color.

China's k gold was calculated at the standard of 4.15% per k in the early days of liberation, after 1982.It has been unified with the international standard, with 4.1666% per k as the standard.

The color of gold changes due to the addition of other elements in cooked gold.People usually call cooked gold that has been added with metallic silver but no other metals "clear gold", while gold that has been mixed with silver and other metals is called "mixed-color gold".

That's why.When you buy gold, you need to carefully distinguish the authenticity of gold.

If you want to distinguish the real gold from the fake gold, you must first know what is real gold and which is fake gold.

1. Gold plating is to plate a layer of gold on the surface of other metals by electroplating. The color is similar to real gold, golden and bright, and it is difficult to identify when it is new.However, the gold-plated feel is lighter, the texture is harder, and there is no mark on the teeth, and it is easy to fade after a long time.Some gold plating with poor electroplating, the color is either red or white, or blooming.

2. Color--gold refers to wrapping 24k or 22k gold foil on the surface of other metals. If the k number of gold foil is too low, its flexibility is poor.The appearance of gold-coated gold is similar to that of real gold. It is shiny and not easy to fade, making it hard to tell whether it is true or not.However, if you carefully observe the depressions, corners, and back of the jewelry, you can find that the gold foil is uneven, and there are warped edges and skins.

If there is a broken joint, it can be seen from this that the section of the metal material is yellow on the outside and white on the inside.In addition, the feel of gold-coated is lighter, and the texture is harder than pure gold. It is not easy to bend, and the gold leaf is easy to peel off after wearing for a long time.

3. The color of copper is reddish yellow, fake, with dark luster, soft texture and light weight.Copper alloy (copper-tin alloy), whitish in color, hard and light in quality, fading and making the skin black.

4. Pure gold (99.99% gold content) is soft in texture, can be easily bent, has a golden color, is pure and soft, and feels heavy to the touch.

5. Carat gold is slightly hard, with no marks on the teeth, and the color is yellow with white, and decreases with the number of carats, white gradually increases, and yellow gradually lightens.

After you know these five points, you can go to buy gold. However, when buying gold, you need to be more careful, otherwise there is still the possibility of being cheated.

When you go to a gold store, first of all you have to pay attention to the fineness of the gold you choose.Thousands of pure gold refers to the name with a gold content of not less than 999 per thousand, which is the highest value in the naming of jewelry fineness.

Thousands of pure gold jewelry will have a proprietary imprint representing the manufacturer's code, material and purity, such as x gold 999, the letter x represents a certain manufacturer's code, gold refers to the material of the jewelry, and 999 refers to the purity of the metal.

Choose a good quality pure gold female ring.The commonly used formulas are: weigh the weight, look at the color, examine the phonology, fold the soft and hard, and use the sour point.

Pure gold has its unique golden luster, and pure gold will shine brightly under strong light.This is not available in other metals including copper.

Then you have to carefully observe the appearance of the gold jewelry you choose, and then the shape of the jewelry is attractive.However, if it is not made with fine craftsmanship, it will not highlight the charm of jewelry. Therefore, when choosing any jewelry, we should check the appearance of the jewelry and choose which jewelry is exquisitely crafted and has no obvious defects for purchase.

Generally, the principles that should be adhered to are: the surface of the jewelry should be smooth and clean, without traces of processing such as filing, scraping, and hammering, and without obvious processing defects such as burrs, blisters, pores, cracks, and inclusions; the welding is stable, and there is no false welding or exposed welding. And obvious welding scars; the design is reasonable, for example, there should be no incorrect pairing of small hooks with weight chains or large hooks with thin chains.

Figure out these situations.When you buy gold, you won't be fooled.

Speaking of this, some people may want to ask, what is the charm of this metal with the chemical symbol au, and why is it so obsessed?

First of all, gold is an alien substance.

There are reports that prospectors in Kangaroo Country have unearthed a 5.5kg piece of gold, estimated to be worth 30 meters of gold.This makes people curious.How much gold is there on earth, and where does it come from?

"It can be said that almost all the gold on earth comes from outer space."

"The solar system is not very old in the universe. Before the solar system formed, there were some stars on its 'field'. These stars have passed through a long time. At the end of the evolution, supernova explosions occurred, some stars died, some occurred Nuclear fusion, nuclear reaction. During which various elements are formed.

These forming elements combined to form the solar system.Protostars are formed, which then evolve into new planets.Like Earth, Venus, Mars..."

The gold element on the earth is the product left over from the continuous collision, death and formation of these stars.

As early as the Stone Age more than 6200 years ago, the Bulgarian primitive people had already started processing gold. In 3600 BC, the ancient Egyptians mastered the gold purification technology.

According to historical records, at that time, Mi-tan-ni-king Tu-sh-la-ta said that gold was "more than clay" in Egypt.

The reason why gold can be discovered by human beings so early is because it basically exists in the form of pure gold in nature, shining under the sun, and human beings, like many animals, have a natural instinct for shiny things. attention and preferences.

The official website of the World Gold Council announced that 100 million people around the world rely on gold mining for their livelihood every year, and since the California Gold Rush, more than 90% of the world's gold mines have been mined.Of course, this is only the gold mine that can be mined on the surface of the ground, and a large number of gold mines exist on the seabed.

Second, gold is a chemically stable substance.

The chemical properties of gold are very stable, and it has excellent resistance to chemical corrosion and tarnish. "True gold is not afraid of fire", gold can also resist high temperature.At the same time, gold is very "soft" and is the darling of industrial manufacturing.

To put it bluntly, gold is a heavy metal, but its popularity must be related to its own characteristics.The chemical property of gold element is very stable, has excellent resistance to chemical corrosion and discoloration, can resist high temperature, and is particularly stable in alkali and various acids.

"Only in aqua regia, that is, a mixture of hydrochloric acid and nitric acid with a ratio of 3:1, and very few solutions, can it be dissolved. It is this stability that allows gold to be passed down from ancient times to the present."

At the same time, gold is so dense that a ton of gold can be made into a cube, which is roughly the size of a shoebox.

This property of gold may be used to explain why "suicide by swallowing gold" is really feasible.

"Although the gold element is unlikely to react with gastric juice and produce harmful substances, a small piece is extremely heavy. Swallowing it may oppress the stomach, cause gastric perforation and bleeding, affect digestion, and eventually lead to death."

Although gold is "stubborn" - not easy to dissolve, "bulky" - high density, but who would have thought that the heart of gold is very "gentle": gold is very malleable and soft.

When receiving gold medals in costume dramas or Olympic champions.They can often be seen biting gold, leaving faint tooth marks.

"Gold is the most malleable metal. 1 gram of gold can be stretched into gold wires up to 4000 meters long. It can also be hammered into gold foil, which is much thinner than paper. You can draw marks on the surface of gold with your fingernails. .”

properties of gold.It has become the darling of various industrial manufacturing industries.

Gold is often made into gold wire and gold powder, plated on the surface of other metals, pottery and glass, or made into superconductors and organic gold, which are widely used in high-tech industries, such as electronics, communications, chemical, medical and other fields.

Why gold is so popular, there is another point, and the most important point, that is, gold is a symbol of wealth!
As the saying goes, rare things are expensive.In any era, gold is hard currency.Although gold is soft and malleable, if it is everywhere like ordinary stones, it is naturally impossible to be fired at such a high price.

The rarity of gold has made it the focus of the world's attention since ancient times.According to the data released on the official website of the World Gold Council, as of July 2012, the top ten official gold reserves in the world are the United States, the Chariot State, the International Monetary Fund (imf), the Noodle State, the Lanxi State, China, and the Bank of China. China, Bear Country, Japan-Japan and Windmill Country.

According to the report of the World Gold Council, all the gold that has been smelted in the world is about 17 tons.

But in ancient times when the excavation and refining technology was not yet perfect.Gold is even rarer.

Because the property is quite stable, soon after excavation, it was soon regarded as the highest level of currency transactions by people all over the world, whether it is foreign gold coins or ancient Chinese gold ingots.Most of them can only appear in the hands of princes and nobles and become a symbol of wealth.

At present, although gold is no longer the main currency in circulation.But its value has become increasingly prominent.

An aunt who doesn't understand economics described it this way: "Look at those war years and turbulent years, paper money and coins have depreciated. They are worthless, only gold is still valuable. How many people carry the few remaining gold bars and live in peace? Get rich overnight."

As a metal currency, gold itself will not depreciate. Therefore, whether in China or internationally, many people choose to buy gold so that their wealth will never be affected by fluctuations in the economic environment.

Finally, gold is also a carrier of culture!

For the Chinese, gold is not only a material, but also a spiritual product and a cultural carrier.Even now, top-notch concepts or substances, we have to give it the title of "golden": Golden Week, Golden Island, Golden Ratio...

At the beginning of its discovery, gold was monopolized by the rich and powerful because of its rarity, without exception in the East and the West.

The yellow used by ancient Chinese emperors is the same color as gold.The long-term feudal system has made gold in the eyes of ordinary people full of mystery and supremacy.

A very simple example, even now, we have to give the top concept or substance the title of "gold": Golden Week, Golden Island, golden ratio... and the idioms related to "gold" are basically They are all based on praise: turning stones into gold, getting titles on the gold list, making the house full of gold and jade...

"Gold" is so precious in the hearts of Chinese people, so when it comes to major festivals, "gold" is also the leading role.The 50th anniversary of marriage is called the "golden wedding". When marrying a daughter, the parents of the man will give the daughter-in-law a gold necklace, gold ring, and gold earrings, which are the famous "three golds".

Newborn children are used to giving "Jinhua Peanuts"... Every "gold" contains strong blessings and wishes for a better future, becoming an irreplaceable carrier of folk culture.

In the consumer psychology of Chinese people, gold is often used as a souvenir of important events in life.Gold often appears as a gift at weddings, birthday celebrations for the elderly and birthdays for young people.In the past, Chinese did not celebrate their birthdays until after their children were full moon and adults reached their 50th birthday.The old etiquette is no longer seen among today's young people, and Western rituals are generally adopted.

Many feelings can only be accurately expressed through gifts.In gold consumption, we can well link modern and traditional psychology through important links in life.

All in all, gold occupies a very important position in the hearts of Chinese people. Inheriting Chinese gold customs and culture can continue traditional etiquette and enhance communication and emotional exchanges between people. (To be continued..)
ps: Note: Thank you Zhixiu for your support, thank you!