Is it necessary to store silver?

The preservation of silver is certain. Silver as a currency has a history of thousands of years, but its appreciation is not necessarily.

silver

Silver, namely silver, is opposite to gold. Because of its white color, it is called silver, which is often used as money and decorations.

Pure silver is white, metallic, soft, hardened after being mixed with impurities, and its color is grayish red. Pure silver is soluble in nitric acid and sulfuric acid, and mostly exists as a compound in nature. It has high ductility, and its thermal conductivity and electrical conductivity are among the best among metals.

Pure silver is white in color, metallic in luster with impurities, soft in quality, hardened with impurities, and grayish red in color. The melting point is 96 1.93℃, the boiling point is 22 12℃ and the density is 10.5g/cm3 (20℃). Silver is soft, flexible and malleable, second only to gold. It can be pressed into sheets and drawn into filaments. Soluble in nitric acid and sulfuric acid. The reflectivity of silver to light reaches 9 1%. At room temperature, halogen can slowly combine with silver to form silver halide. Silver does not react with dilute hydrochloric acid, dilute sulfuric acid and alkali, but can react with strong oxidizing acid concentrated nitric acid and concentrated hydrochloric acid.

The main uses of silver are mainly based on three pillars: industry, photography and jewelry and silverware. The total demand of these three types of silver accounts for about 85% of the demand for silver.

Since ancient times, silver and gold have been regarded as a symbol of wealth together. The chemical symbol of silver is Ag, which comes from the Latin Argertum, meaning "light and brightness". Because silver is white, it is called "silver".

Silver not only has good electrothermal conductivity, but also has high photosensitivity and luminous characteristics, and is used in industry, photography, jewelry, currency manufacturing and so on.

Compared with gold, silver was used for coinage more and earlier and entered the circulation field because of its large supply and low value. Many countries have established the silver standard, with silver coins as the mainstream currency.

In ancient times, people knew about silver. Like gold, silver is a precious metal with a long history of application, which has a history of more than 4,000 years. Because of the unique and excellent characteristics of silver, people give it dual value of money and decoration. The pound and silver dollar used before the liberation of China were silver and copper alloys. 1 silver in Qing dynasty is equivalent to 400-500 yuan RMB today.

Silver is more active than gold. Although its abundance in the crust is about 15 times that of gold, it rarely exists as a single substance, so it was discovered later than gold. In ancient times, people already knew how to mine silver ore, because the amount of silver obtained at that time was very small, which made its value more expensive than gold. From BC 1780 to BC 1580, the Egyptian code stipulated that the value of silver was twice that of gold. Even in the17th century, the value of Japanese gold and silver was equal. Silver was first used as decorations and tableware, and later used as currency.