If real-time gold rises, gold futures will also rise. Gold futures means that investors predict the trend of gold in advance and buy contracts at the price of gold at some point in the future, so futures will directly affect the rise and fall of gold. : 2. Extensibility:
Extremely powerful. 1 oz gold can be stretched to 50 miles long, and its ductility makes it easy to cast, making it a good choice for making jewelry. Of all metals, gold has the greatest pulling force.
3. Extensibility:
Second to none. It will cause extremely thin gold sheets to roll up easily. Gold weighing 1 oz can be hammered down to 1 ft, 100 m2. The ancients hammered it into thin slices and spread it in temples and palaces for decoration. All these can explain the flexibility and ductility of gold.
The color of gold is golden yellow, which has a metallic texture and is not easy to decompose. The density is 19.3g/cm3 and the melting point is1064.4℃; Good ductility, can be pressed into thin foil, and has extremely high heat and thermal conductivity. The resistance of pure gold is 2.4P Pure gold has good chemical resistance and is the best electroplating material.
As a precious metal, gold has good physical properties. "Real gold is not afraid of fire" means that gold has high chemical stability and is not easy to react with other substances, so there is no need to worry about oxidation and discoloration. Even in the molten state, it will not be oxidized and discolored, and it will still be golden yellow after cooling. High density and heavy touch. Good toughness and ductility, good electrical conductivity. Pure gold is bright yellow, but the color changes greatly after mixing with other metals, such as gold-copper alloy is dark red, and silver-containing alloy is light yellow or grayish white. Gold is easily ground into powder, which is also the reason why gold is dispersed in nature. Pure gold jewelry is also easy to wear and lose weight.
In Mendeleev's periodic table, the atomic number of gold is 79, that is, the nucleus of gold contains 79 protons, which are positively charged. At the same time, gold has good chemical stability because it conforms to the half-full law. In the metal market, gold and ruthenium, rhodium, palladium, osmium, iridium, platinum and other metals are collectively called precious metals.
Although gold is a very soft metal, it is not as good as lead and tin. Nails can be used to draw marks on pure gold, which makes gold very easy to process. But this is not ideal for the manufacturers of decorations, because it is easy to scratch the decorations, make them lose their luster and even affect their appearance. Therefore, when gold is used to make jewelry, copper and silver are usually added to improve its hardness.