1. Now gold is 368 per gram. Gold is a soft, golden and corrosive precious metal. Gold is a rare, more precious and more valuable metal. Gold is generally expressed in the world that "two" as a gold unit in ancient China was a very important metal. It is not only a special currency of reserves and investment, but also an important material for the jewelry, electronics industry, modern communications, aerospace industry and other departments. 2. The chemical symbol of gold is AU, and the English code of finance is XAU or GOLD. The name of the AU comes from the story of the goddess Aurora in Roman mythology, which means the shining dawn. This information 1. The forging of gold is ranked first. It can cause extremely thin gold films to roll up. One ounce of gold can be hammered as thin as 4 million feet thick and 100 square feet larger. The ancients hammed it into thin slices, paving temples and palaces as decoration. These can show the elasticity and ductility of gold. The color of gold is golden yellow, with metal luster and difficult to break down. The density is 19.3g/cm3, 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 chemical resistance and is the best electroplating material. 2. As a precious metal, gold has good physical properties. "True Gold is not afraid of fire" means that the chemical stability of gold is high, it is not easy to react with other substances. Do not worry about oxidation and discoloration. Even in the melting state, it will not be oxidized and discolored, and it will still glow after cooling. High -density and heavy feeling. Good toughness and ductility, good conductivity. Pure gold is bright yellow, but the color changes greatly after adding other metals. For example, gold and copper alloy are dark red, and silver alloy is pale yellow or gray -white. Gold is easily grinded into powder, which is why gold is scattered in nature. Pure gold jewelry is also easy to wear and reduce its weight. 3. In the elemental period table of Menjiev, the numeral of the gold atomic order is 79, that is, the golden nucleus of the gold contains 79 protons with positive charge. At the same time, due to the compliance with semi -full rules, the pipes have good chemical stability. In the metal market, metals such as gold and 上, 铑, 钯, 锇, 铱, and platinum are collectively referred to as precious metals. 4. Although gold is a very soft metal, it is not as good as lead and tin. You can use nails on pure gold. This softness makes gold easy to process. However, this is not ideal for jewelry manufacturers, because it is easy to scratch the accessories, making the jewelry lose its gloss and even affects the aesthetics. Therefore, when making jewelry with gold, copper and silver should be added to improve their hardness. Gold is easy to forge and stretch. It can be grinded into a transparent green foil with a thickness of 0.001 mm. 0.5 grams of gold can be pulled into a 160 -meter -long gold silk.
1. Now gold is 368 per gram. Gold is a soft, golden and corrosive precious metal. Gold is a rare, more precious and more valuable metal. Gold is generally expressed in the world that "two" as a gold unit in ancient China was a very important metal. It is not only a special currency of reserves and investment, but also an important material for the jewelry, electronics industry, modern communications, aerospace industry and other departments.
2. The chemical symbol of gold is AU, and the English code of finance is XAU or GOLD. The name of the AU comes from the story of the goddess Aurora in Roman mythology, which means the shining dawn.
This information
1. The forging of gold is ranked first. It can cause extremely thin gold films to roll up. One ounce of gold can be hammered as thin as 4 million feet thick and 100 square feet larger. The ancients hammed it into thin slices, paving temples and palaces as decoration. These can show the elasticity and ductility of gold. The color of gold is golden yellow, with metal luster and difficult to break down. The density is 19.3g/cm3, 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 chemical resistance and is the best electroplating material.
2. As a precious metal, gold has good physical properties. "True Gold is not afraid of fire" means that the chemical stability of gold is high, it is not easy to react with other substances. Do not worry about oxidation and discoloration. Even in the melting state, it will not be oxidized and discolored, and it will still glow after cooling. High -density and heavy feeling. Good toughness and ductility, good conductivity. Pure gold is bright yellow, but the color changes greatly after adding other metals. For example, gold and copper alloy are dark red, and silver alloy is pale yellow or gray -white. Gold is easily grinded into powder, which is why gold is scattered in nature. Pure gold jewelry is also easy to wear and reduce its weight.
3. In the elemental period table of Menjiev, the numeral of the gold atomic order is 79, that is, the golden nucleus of the gold contains 79 protons with positive charge. At the same time, due to the compliance with semi -full rules, the pipes have good chemical stability. In the metal market, metals such as gold and 上, 铑, 钯, 锇, 铱, and platinum are collectively referred to as precious metals.
4. Although gold is a very soft metal, it is not as good as lead and tin. You can use nails on pure gold. This softness makes gold easy to process. However, this is not ideal for jewelry manufacturers, because it is easy to scratch the accessories, making the jewelry lose its gloss and even affects the aesthetics. Therefore, when making jewelry with gold, copper and silver should be added to improve their hardness. Gold is easy to forge and stretch. It can be grinded into a transparent green foil with a thickness of 0.001 mm. 0.5 grams of gold can be pulled into a 160 -meter -long gold silk.