alan wholesale jewelry "True gold is not afraid of fire", this is the saying. In fact, the heating of pure gold to 1063 ° C will also melt. However, after it is melted multiple times, it does not change the nature. Another characteristic of gold is soft. Pure gold can be printed with fingernails. It has excellent ductility. One or two gold can be made into two large gold foil as two double beds. This thin gold foil is green and translucent. One gram of gold can be pulled into 10,000 meters of gold silk. Because Jin has a particularly good conductivity and never rust, it is often used in the electronics industry to make an integrated circuit contact and wire, and welded under a microscope. gold is very expensive. In the crust, the content of gold is not very small. Most of the sand gold in nature is pure gold. Why is gold so expensive?是的，金在地壳中不算稀少，甚至比许多稀有元素还多得多；然而，它太分散了，几千年以来，人类主要利用金子比重大这个特点，进行砂里淘金，一两砂金There are 70,000 to 800,000 golden powder. The small and scattered natural sand gold cannot be imagined. The hundreds of thousands of gold powder can be obtained by washing many tons of river sand. This is not a relaxed thing for mechanized gold rushing. Besides, the ancients have been giving gold by hand, how much labor should be paid! In the past, human beings do not know how many tons of steel have been refined. However, the cumulative output of gold is only 97,000 tons, which can be imagined to see the difficulty of collecting gold. Because gold will not be consumed because of rust, more than 90,000 tons of gold, except for making scientific instruments, electrical appliances and jewelry, most of them are locked in the vaults of banks in various countries! The chemical properties of gold are stable, so it is particularly resistant to corrosion, and the splendid golden light is dazzling and lasting. To this end, people like to make a pen tip with gold, make jewelry, put gold on the case, on the glasses rack, on the cigarette case; decorate it with gorgeous golden appearance. Although gold is stable and corrosion -resistant, there are many liquids that can dissolve gold! Wang Shui is one of them. It is mixed with a part of nitric acid and three serves. It has the ability to "complete" hydrochloric acid; nitric acid has the ability to oxidize. If these two abilities are united, gold can dissolve gold. After the gold is dissolved in the king water, it generates a new compound called hydrogen chlorine, which is a golden yellow crystal, which is delicate and beautiful like a fine needle. The sodium cyanide solution that can dissolve gold. Sodium cyanide is a drama drug, but its solution has a strong "collapse" ability, so it can also dissolve gold. In addition, the hybrid acid of selenium and sulfuric acid, the high -temperature melting liquid of sodium nitrate and the alkali can also dissolve gold. has a liquid that dissolved gold, which adds powerful means when people's alchemy and recycling of abandoned gold -containing substances.
alan wholesale jewelry "True gold is not afraid of fire", this is the saying. In fact, the heating of pure gold to 1063 ° C will also melt. However, after it is melted multiple times, it does not change the nature. Another characteristic of gold is soft. Pure gold can be printed with fingernails. It has excellent ductility. One or two gold can be made into two large gold foil as two double beds. This thin gold foil is green and translucent. One gram of gold can be pulled into 10,000 meters of gold silk. Because Jin has a particularly good conductivity and never rust, it is often used in the electronics industry to make an integrated circuit contact and wire, and welded under a microscope.
gold is very expensive. In the crust, the content of gold is not very small. Most of the sand gold in nature is pure gold. Why is gold so expensive?是的，金在地壳中不算稀少，甚至比许多稀有元素还多得多；然而，它太分散了，几千年以来，人类主要利用金子比重大这个特点，进行砂里淘金，一两砂金There are 70,000 to 800,000 golden powder. The small and scattered natural sand gold cannot be imagined. The hundreds of thousands of gold powder can be obtained by washing many tons of river sand. This is not a relaxed thing for mechanized gold rushing. Besides, the ancients have been giving gold by hand, how much labor should be paid! In the past, human beings do not know how many tons of steel have been refined. However, the cumulative output of gold is only 97,000 tons, which can be imagined to see the difficulty of collecting gold. Because gold will not be consumed because of rust, more than 90,000 tons of gold, except for making scientific instruments, electrical appliances and jewelry, most of them are locked in the vaults of banks in various countries!
The chemical properties of gold are stable, so it is particularly resistant to corrosion, and the splendid golden light is dazzling and lasting. To this end, people like to make a pen tip with gold, make jewelry, put gold on the case, on the glasses rack, on the cigarette case; decorate it with gorgeous golden appearance.
Although gold is stable and corrosion -resistant, there are many liquids that can dissolve gold!
Wang Shui is one of them. It is mixed with a part of nitric acid and three serves. It has the ability to "complete" hydrochloric acid; nitric acid has the ability to oxidize. If these two abilities are united, gold can dissolve gold. After the gold is dissolved in the king water, it generates a new compound called hydrogen chlorine, which is a golden yellow crystal, which is delicate and beautiful like a fine needle.
The sodium cyanide solution that can dissolve gold. Sodium cyanide is a drama drug, but its solution has a strong "collapse" ability, so it can also dissolve gold. In addition, the hybrid acid of selenium and sulfuric acid, the high -temperature melting liquid of sodium nitrate and the alkali can also dissolve gold.
has a liquid that dissolved gold, which adds powerful means when people's alchemy and recycling of abandoned gold -containing substances.