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Mercury is a highly toxic substance with unique chemical properties. Mercury is liquid at room temperature and has a silvery white color, resembling flowing silver, so it is also called mercury.
Mercury is chemically stable and does not easily react with oxygen. Even when heated, it requires a higher temperature to slowly oxidize to form mercury oxide. However, mercury can form alloys with many metals, and this alloy is called amalgam. For example, when mercury is mixed with metals such as gold and silver, it can form amalgam. This property was used in ancient times to extract precious metals such as gold and silver.
Mercury can react rapidly with sulfur, and the two combine to form mercury sulfide. Mercury sulfide is brightly colored and is often used as a pigment. This reaction is extremely important when dealing with mercury leakage, because sulfur powder can react with mercury to convert highly toxic mercury into relatively stable and low-toxic mercury sulfide, thereby reducing the harm.
Furthermore, mercury is volatile and will continue to release mercury vapor. Mercury vapor is also highly toxic, and once inhaled by the human body, it will cause serious damage to the nervous system, kidneys, etc. And mercury has bioaccumulation in the environment, which will continue to accumulate through the food chain, posing a huge threat to the ecosystem and human health.
Mercury's chemical properties determine that it has applications in many fields, such as ancient alchemy, mercury thermometers, etc., but because of its highly toxic nature, it must be used and handled with extreme caution to prevent irreparable harm to the environment and human body.

Mercury, commonly known as mercury, is a special liquid metal with the following physical properties:
First, it is liquid at room temperature and pressure, which is the most significant property of mercury. Its fluidity is excellent, and it can roll freely on a plane, just like a smart silver bead. This characteristic makes it different from most metals that are solid at room temperature.
Second, mercury has a silver-white metallic luster, which is dazzling and has an extremely bright appearance. It shines brightly in light. Its luster is unique and distinct, and it is easy to identify.
Third, the density of mercury is quite high, reaching 13.59 grams per cubic centimeter, much higher than that of common water. When mercury is placed in water, it will quickly sink to the bottom. This high density property makes mercury have unique applications in some special occasions.
Fourth, the melting point of mercury is very low, only -38.87 ° C, which means that mercury can still maintain a liquid state at a relatively low temperature. And its boiling point is relatively high, 356.6 ° C. This temperature range allows mercury to maintain a stable liquid state in a normal temperature environment.
Fifth, mercury has good electrical conductivity. Although its electrical conductivity is slightly inferior to that of silver and copper and other excellent conductors, it can still play a role in conducting electricity in many electrical equipment.
Sixth, the surface tension of mercury is large, causing mercury droplets to form a nearly spherical shape on a flat surface, maintaining their own stability with a minimum surface area. This property is quite common in some physical experiments and phenomenon observations.

For the sake of the guests, the six oceans of the sea can be used for the best, and they can wait for the friends. The things of the sea, such as crab, can be fried or boiled, or steamed or boiled, each showing its own flavor. Such as the beauty of the sea, by steaming, accompanied by ginger, and its taste, can make the big and fast flowers of the sea, increase the pleasure of the banquet, and also show the hospitality of the host.
The sacrifice of the sea, the six oceans have an important position. The ancients respected the sky and respected the ancestors, and sacrificed to the ancestors. The things of the sea are taken from the sea, and the things of heaven and earth are collected, and they are used to show respect to the ancestors of the gods. For example, if you use fat crabs, put them whole, and offer them at the sacrifice, I hope that the ancestors of the gods will bless the family for peace, rain, and five times. The sea used for the sacrifice is six times, and the cooking and cooking are all well-ordered, so as to be combined.
As for the health, the things of the sea are rich in food. The sea contains a lot of fatty acids and fatty acids, which are beneficial to the heart and blood vessels; it is rich in protein and trace elements, which can be used to nourish the body. The daily diet of the sea can be used to manage the body. However, it is also necessary to eat in a high degree. If you eat the sea, you may be afraid of spleen and stomach.
In short, the sea has three important functions in terms of visitors, sacrifices, and life, reflecting the ancient people's food culture, beliefs, and wisdom.

"Tiangong Kaiwu" talks about brine and salty things, and there are many ways to make them. To make brine and salty food, one of the methods is the technique of frying. First take brine and salty water, put it in an iron kettle, and cook it with firewood. The fire is raging, the water gradually evaporates, and the salt in the brine gradually thickens. When it is concentrated to a certain extent, crystalline salt can be seen to precipitate. This salt can be used for seasoning to enhance the flavor of dishes.
Furthermore, the method of drying is also good. Choose a flat and open place with sufficient sunshine and dig it into a salt field. Bring brine and salty water into the field and let it be exposed to the sun. The sun is busy, the water slowly evaporates, the salt condenses, and finally forms salt grains. The salt obtained by this method is pure in texture and can be used for cooking, which can make the taste of dishes more mellow.
Another method is to drizzle brine. Coat the brine soil with plant ash, and then drizzle it with water. The marinade seeps into the ash and gathers under it. Collect the marinade and fry it again to get salt. The salt obtained in this way may have a unique flavor and can be used to cook different dishes, which can add a unique taste.
Or use the method of cellaring. Digging a cellar in the ground, the brine and salt are placed in the cellar, and over time, the salt will self-aggregate. When taking it, remove the brine from the cellar, or fry or sun it, to make usable salt. This salt may be stained with a different atmosphere due to cellaring, adding a unique flavor to the dishes.
All kinds of preparation methods have their own advantages and disadvantages. It is necessary to choose and use according to the convenience of time and place, and the nature of materials, in order to make suitable brine and salty dishes and satisfy the desire of everyone's tongue.

When storing and transporting mercury, there are many things to pay attention to.
First, store in a cool, ventilated and dry place. The characteristics of mercury are easy to evaporate. If it is in a warm and humid place, it evaporates faster, causing its loss, and the evaporated mercury gas is toxic and endangers the people around it. Therefore, the warehouse needs to be cool and ventilated to reduce the volatilization of mercury. And the container for storing mercury must be tightly sealed. Mercury liquid is easy to disperse. If the container has gaps, mercury will leak out, which will cause waste and pollute the environment. It is commonly used in thick glass or metal containers, and it should be properly placed after sealing.
As for transportation, the process must be smooth. Mercury is heavy and mobile. If the transportation is turbulent and the container is fragile, the mercury will overflow. Therefore, the transportation tool needs to have good performance and smooth driving. The transportation personnel should also have professional knowledge and skills, and be familiar with the characteristics of mercury and emergency disposal methods. If mercury leaks during transportation, it should be covered with sulfur powder immediately. Due to the easy combination of mercury and sulfur to form mercury sulfide, the toxicity is greatly reduced, and then it should be properly cleaned up.
Furthermore, no matter whether it is stored or transported, it should be clearly marked. Express words such as "toxic goods" to make everyone aware of the danger, so as to avoid accidental touch and poisoning. And in the place of storage and transportation, protective equipment and emergency rescue equipment, such as gas masks and mercury absorbers, should be prepared to prevent accidents. In this way, the safety of mercury during storage and transportation is ensured, preventing harm.