Why can silver be tested for poison?

Poison refers to arsenic, which is backward in ancient technology and contains a small amount of sulfur and sulfide. When it comes into contact with silverware, a chemical reaction will occur. A black "silver sulfide" will be produced on the surface of silver. At present, the technology is mature, the sulfur and sulfide in arsenic are extracted, and the metal of silver is chemically stable, so it generally does not react, and whether it is toxic or not cannot be detected. And drugs that do not contain sulfur will not be detected. On the contrary, silver will react with sulfur-containing articles.

Therefore, silver can't be used to identify whether it is toxic or not, and it can't be a tool for testing poison.

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.

Skin contact: take off the contaminated clothes immediately and rinse with plenty of running water for 20 ~ 30 minutes. If you don't feel well, see a doctor immediately.

Eye contact: lift the eyelid immediately and rinse it thoroughly with plenty of flowing water or normal saline 10 ~ 15 minutes. If you don't feel well, see a doctor immediately.

Inhalation: leave the scene quickly and go to a place with fresh air. Keep the respiratory tract unobstructed. If you have difficulty breathing, give oxygen. Breathing and heartbeat stop, immediately carry out cardiopulmonary resuscitation and seek medical attention in time.

Ingestion: drink water without vomiting. If you don't feel well, see a doctor immediately.

Content distribution

The content of silver in nature is not much, a small amount exists in the form of simple substance, and more exists in the form of compounds.

Content in shell /ppm0.07

Content of elements in the sun /ppm7. 1

Element content in seawater (deep in the Atlantic Ocean) /ppm 0.0000024

physical features

Silver is a white and shiny metal, and its atomic structure is face-centered cubic structure.

The melting point is 9665438 0.93℃, and the boiling point is 2265438 02℃

Relative density (water = 1) 10.49