2.AG (Access Gateway) can mean "Access Gateway" in communication.

3.AG stands for joint-stock companies in German-speaking countries.

4.AG is here again. Mostly used for starcraft? In the competitive ladder games such as Warcraft, it is usually a requirement after being unwilling to lose to the opponent. Usually gg (good game, that is, giving up) has to be played out before it can make a request to the player. It is also used to express the desire to continue studying and practicing with opponents. It is one of the polite performances of e-sports players.

5. Chemical manifestations of silver.

Silver is a transition metal. Chemical symbol Ag. Silver is one of the metals known and used in ancient times, and it is an important precious metal. Silver exists in the form of simple substance in nature, but most of it exists in silver mines in the form of bound state. Silver has relatively stable physical and chemical properties, good thermal and electrical conductivity, soft texture and rich ductility. Its reflectivity is extremely high, reaching over 99%. It has many important uses.

Forensic doctors in ancient China knew long ago how to use the "silver needle autopsy method" to determine whether the deceased died of poisoning, which helped solve many murders.

Silver is also a metal that can be eaten by human beings. In China and India, there are records of wrapping food with silver foil and taking pills. At the same time, silver is also food for some creatures. According to China's ancient book "History of Tianxianglou", there was a woman who hid private silver 150 in ancient times. One day, she opened the box to check the hidden silver, but the silver was gone. The woman was shocked and suspected that she had been stolen, which made the whole family panic for a while. Later, when I opened the box to look for it, I saw many termites gathering together and eating the remaining silver particles. In a rage, the woman threw termites into the furnace to avenge herself. "Fire ants die, silver comes back", which is exactly 150 beam.

Silver is not easy to react with sulfuric acid, so sulfuric acid can be used to clean the copper oxide fire marks left by silver welding annealing in jewelry manufacturing. Silver easily reacts with sulfur and hydrogen sulfide to form black silver sulfide, which is often found on tarnished silver coins or other articles. Silver can react with oxygen at high temperature to produce brown-black silver oxide (it can also react at room temperature, but the speed is very slow).

In the presence of potassium bromide (KBr), metallic silver will be eroded by strong oxidants such as potassium permanganate or potassium dichromate. These compounds are used in photography to bleach visible images and convert them into silver halide, which can be removed by sodium thiosulfate and re-developed to enhance the original images.