Can. Gold is a single form of chemical element (AU), which is a soft, golden, corrosive precious metal. Gold is one of the rare, precious and extremely valued metals. Internationally, gold is generally based on ounces. In ancient China, "two" as a gold unit, a very important metal. It is not only a special currency for reserves and investment, but also an important material for the jewelry, electronics, modern communications, aerospace and air industry and other departments. This information 1. The chemical symbol of the gold is AU, and the English code in finance is XAU or GOLD. The name of the AU comes from a story of the goddess of dawn in Roman mythology, which means the shining dawn. As of October 12, 2021, the price of gold was $ 1760/ounce. 2. Gold can cause extremely thin and easy to roll up. 1 ounce of gold can be hammered to 1th of 4 million and 100 square meters. The area is large. The ancients hammered it into thin slices to decorate the temples and the palace. These can explain the strong flexibility and forgedness of gold. The color of gold is golden yellow, metallic luster and difficult to decompose. The hardness is 2-3, the pure gold is 19.3, and the melting point is 1064.4 ° C; it has good ductility and can be pressed into thin foil. It has high heat transfer and conductivity. The resistance of pure gold is 2.4P. Pure gold has good anti -chemical corrosion and is the best electroplating material. 3. As a precious metal, gold has good physical characteristics. "Real gold is not afraid of fire refining" means that the gold under the general flame is not easy to melt. The density is strong and the feel is heavy. Good toughness and ductility, good guidance. Pure gold has gorgeous yellow, but after incorporating other metals, the color changes greatly. For example, gold and copper alloy are dark red, and the silver alloy is light yellow or gray -white. Jin Yi was grinded into powder, which is why Jin is scattered in nature. Pure gold jewelry is also easily worn and reduced. 4. Although gold is a very soft metal, it is not as good as lead and tin metal. Use nails on pure gold to draw traces. This softness makes gold very easy to process. However, this point is not ideal for the maker of the decoration, because it is easy to make the decorations hurt and make it make it make it wound and make it it. Lost luster and even affect beauty. Therefore, when making jewelry with gold, copper and silver are generally added to improve their hardness.
Can. Gold is a single form of chemical element (AU), which is a soft, golden, corrosive precious metal. Gold is one of the rare, precious and extremely valued metals. Internationally, gold is generally based on ounces. In ancient China, "two" as a gold unit, a very important metal. It is not only a special currency for reserves and investment, but also an important material for the jewelry, electronics, modern communications, aerospace and air industry and other departments.
This information
1. The chemical symbol of the gold is AU, and the English code in finance is XAU or GOLD. The name of the AU comes from a story of the goddess of dawn in Roman mythology, which means the shining dawn. As of October 12, 2021, the price of gold was $ 1760/ounce.
2. Gold can cause extremely thin and easy to roll up. 1 ounce of gold can be hammered to 1th of 4 million and 100 square meters. The area is large. The ancients hammered it into thin slices to decorate the temples and the palace. These can explain the strong flexibility and forgedness of gold. The color of gold is golden yellow, metallic luster and difficult to decompose. The hardness is 2-3, the pure gold is 19.3, and the melting point is 1064.4 ° C; it has good ductility and can be pressed into thin foil. It has high heat transfer and conductivity. The resistance of pure gold is 2.4P. Pure gold has good anti -chemical corrosion and is the best electroplating material.
3. As a precious metal, gold has good physical characteristics. "Real gold is not afraid of fire refining" means that the gold under the general flame is not easy to melt. The density is strong and the feel is heavy. Good toughness and ductility, good guidance. Pure gold has gorgeous yellow, but after incorporating other metals, the color changes greatly. For example, gold and copper alloy are dark red, and the silver alloy is light yellow or gray -white. Jin Yi was grinded into powder, which is why Jin is scattered in nature. Pure gold jewelry is also easily worn and reduced.
4. Although gold is a very soft metal, it is not as good as lead and tin metal. Use nails on pure gold to draw traces. This softness makes gold very easy to process. However, this point is not ideal for the maker of the decoration, because it is easy to make the decorations hurt and make it make it make it wound and make it it. Lost luster and even affect beauty. Therefore, when making jewelry with gold, copper and silver are generally added to improve their hardness.