Will silver jewelry vulcanize?

Silver is slightly soluble in water, and silver ions in water have bactericidal effect and will not cause harm to human body. Silver is an edible metal. In more than 300 BC, when the Macedonian emperor Alexander led the army to the East, he was infected with tropical dysentery, and most of the soldiers fell ill and died, and the East was forced to end. However, emperors and officers seldom get sick. The mystery was not solved until modern times. It turns out that the tableware of emperors and officers is made of silver, while that of soldiers is made of tin. Silver can decompose a very small amount of silver ions in water, and silver ions can adsorb microorganisms in water, making the enzymes that microorganisms rely on to breathe ineffective, thus killing microorganisms. The bactericidal ability of silver ions is amazing. A few milligrams of silver per billion can purify 1 kg of water.

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.

But silver jewelry will vulcanize, so many silver jewelry will turn black after a long time.

The so-called poison testing in ancient times used the principle that silver would be sulfide, because most of the poisons in ancient times were arsenic, and because of the backward technology in ancient times, arsenic would contain sulfur and sulfide, so silver would be used for testing.