Benzene, 4-Chloro-2-Fluoro-1-Iodo-

This compound is called 4-bromo-2-chloro-1-iodobenzene, and its physical properties are briefly described below:
4-bromo-2-chloro-1-iodobenzene is mostly liquid at room temperature, because there is a certain van der Waals force between molecules, so that the molecules aggregate to form this state. From the color point of view, it is often colorless to light yellow, and it is close to colorless when pure, and the color becomes slightly darker under the influence of impurities or light.
It has a special odor and has a certain volatility. The continuous movement of molecules causes the odor to spread. The density is higher than that of water, and the relative atomic weight of bromine, chlorine, and iodine atoms in the molecule is large, which increases the mass per unit volume and sinks in water.
4-Bromo-2-chloro-1-iodobenzene is insoluble in water. Water is a substance with strong polarity, while the molecular polarity of this compound is relatively weak. According to the principle of "similar miscibility", the two are difficult to miscible. However, it is easily soluble in common organic solvents, such as ether, dichloromethane, etc., because these organic solvents are similar to their intermolecular forces and can disperse from each other.
Its melting and boiling point is affected by the intermolecular force, the relative mass of the molecule is large, and the van der Waals force is strong. It requires a higher temperature to provide energy to overcome the force, so that the solid state can be converted to a liquid state (melting point) and a liquid state to a gaseous state (boiling point). The melting and boiling point is higher than that of some small molecule organics.

Mercury, bromine, and iodine are all halogen elements, each with unique chemical properties.
Mercury, which is a liquid at room temperature, is a silver-white shiny heavy liquid with relatively stable chemical properties. Mercury can form amalgams with many metals, which makes it useful in metallurgy and other fields. For example, in ancient times, amalgam was commonly used to extract metals such as gold and silver. Mercury can react with oxygen under heating conditions to form mercury oxide. "Tiangong Kaiwu" states: "Where mercury is sublimated to vermilion, it is called silver vermilion (that is, mercury sulfide), and the method is to use masonry (that is, natural mercury sulfide ore) as a kettle, regardless of the number." Indicates that mercury can participate in the preparation of mercury sulfide. Mercury compounds also have various properties, such as mercury chloride, which is highly toxic and can be used as a disinfectant. < Br >
Bromine, a dark reddish-brown smoky liquid at room temperature, is highly volatile and has a pungent odor. Bromine is chemically active and is a strong oxidizing agent. It can react directly with metals, such as reacting with iron to form iron bromide. Bromine can be added to unsaturated hydrocarbons, such as reacting with ethylene to form 1,2-dibromoethane. Although the bromine reaction is not described in detail in the book, the properties of halogen elements have similarities, which can be deduced from their chemical activity. In organic synthesis, bromine is often introduced into bromine atoms as a brominating agent.
Iodine, purple-black crystal, is easily sublimated, oxidizing but weaker than bromine. Iodine turns blue when exposed to starch. This property is often used to test the presence of iodine or starch. Iodine reacts relatively mildly with metals, such as reacting with iron to form ferrous iodide. In living organisms, iodine is an important raw material for the synthesis of thyroid hormones. Although "Tiangong Kaiwu" does not describe iodine in detail, some of its properties may have been recognized in ancient medicine and other fields, such as iodine agents can be used for disinfection.
Mercury, bromine, and iodine, as important elements in the halogen group, exhibit not only active non-metallic properties in chemical properties, but also different reaction characteristics and applications due to differences in atomic structure.

Those who are alkali have their uses in all places. Watching the seashore, the application of alkali is great. The seashore is often soaked by the sea tide, and the soil is saline and alkali, but those who make good use of alkali can turn unfavorable into beneficial. The people there may use alkali to improve the soil, so that the land that repels brine can gradually be cultivated. Alkali is combined with seawater, and salt can be obtained by drying. This is what people need for their livelihood. It is indispensable for seasoning and pickling things in diet.
As for the banks of rivers, alkali also has its function. Where water is transported, alkali can be used to clean boats, remove their dirt, and keep boats moving smoothly. And the water of rivers may have impurities, and alkali can help clarify and make water usable. In the riverside workshop, in the industry of papermaking and cloth dyeing, alkali is an important agent, which can help pulp into paper and make cloth evenly colored.
Between the mountains and forests, although the obvious use of alkali is not as good as that of the seaside and riverside, it is not useless. If there is a mountain fire, the soil nutrients may change, and the alkali can be moderately adjusted to facilitate the regeneration of plants and trees. And in the art of picking herbs and making incense in the mountains, alkali can also be used in the processing method to help it become medicine and fragrance, so that the medicinal power and aroma are appropriate.
In towns, alkali is used more widely. In the matter of cooking, alkali can make pasta soft, steamed buns, buns, etc. If you add an appropriate amount of alkali, the taste will be better. In cleaning houses, alkali can decontaminate and descaling, making rooms clean. In pottery and metallurgy, alkali is a helping agent, helping clay to form and metal to purify.
The old man alkali has its own uses in seaside, riverside, mountain forest, and town, or it is related to people's livelihood, clothing, food, housing, and transportation, or it is tied to the skills of hundreds of workers. It is an indispensable thing in the world.

If you want to make 4 + - halogen-2-river-1-shell shells, the method is as follows:
Prepare good materials first, and you need to get clean halogen materials. This is the foundation. For halogen, choose pure and high-quality products, free of impurities and filth, in order to make the finished product taste pure.
As for river water, you must take living water, and it is better to be clean. The gurgling river water contains natural and delicate energy, which can add unique charm to the production. When taking water, it is best to choose a cool place upstream to avoid its dirt.
The choice of shell shells is particularly critical. When the shell is hard and the flesh is full, look at its color, moist and shiny; look at its appearance, whole and complete. Fresh shells can be wonderful.
When making, first soak the shells in the river water, wash their sediment, remove their filth, and until the water is clear. Then, slowly put the brine into the river water in an appropriate proportion. The ratio of brine is a secret that should be kept secret. It is necessary to make the saltiness appropriate and the five flavors harmonious according to experience and moderation.
When the brine is well integrated with the river water, cook it slowly over low heat. The size of the fire is about success or failure. If the fire is big, the taste will be impatient, and if the fire is small, the strength will not be reached. It is necessary to control the fire patiently, so that the taste of the marinade slowly penetrates into the shellfish. During this period, add stirring often to ensure that the marinade nourishes the shellfish all over the body.
Cook until the shellfish are cooked and tasty, the color is attractive, and the aroma escapes. Remove the shellfish, place it in a ventilated and clean place, and drain it for a while. The 4 + - halogen-2-river-1-shellfish is made. The finished product is delicious and fresh, salty and tasty. It has the mellow taste of the marinade, as well as the clear rhythm of the river water and the fresh aroma of the shellfish. It is really a delicacy.

Nowadays, there are salty water, rivers, and mussels, which have a very shallow impact on the environment and human health.
If the salty water is too much in the water source, it can cause the water quality to deteriorate. In the soil, too much salt will affect plant growth, make it difficult for vegetation to survive, and destroy the ecological balance. And if people drink water with high salt content for a long time, it is easy to cause diseases such as hypertension, aggravate the burden on the kidneys, and endanger their health.
Water is also the source of life. However, if water is polluted, such as industrial wastewater and domestic sewage discharged into it, harmful substances will breed in it, which can cause various diseases. If the water source is not clean, people may drink it, or suffer from gastrointestinal diseases, and in severe cases, it may even cause cancer. And the water ecology is also damaged, and it is difficult for aquatic organisms to survive, which affects the stability of the entire aquatic ecosystem.
The river is home to many organisms. If the river is polluted, not only the lives of organisms in the water are at risk, but also the surrounding ecology is implicated. The riverside plants depend on the river water for nourishment, and the river water pollution hinders the growth of plants. And the river connects all parties, and one pollution can spread to the downstream, affecting a wide range. The imbalance of river ecology will also affect climate regulation, resulting in local climate anomalies.
The clam has the ability to purify water quality in the ecological environment. However, if the environment is harsh, it is difficult for the clam to survive. The decrease of clams will weaken the natural purification ability of the water body. And mussels are a link in the food chain, and their quantity changes will affect the balance of the entire food chain. For humans, although mussels are edible, they may be contaminated by mussels in the environment or accumulate toxins, which is harmful to human health.
Therefore, in order to protect the environment and human health, we must pay attention to the ecology of salt, water, rivers and mussels, protect the water source and clean the river ecology, and seek well-being for the survival of all things and human well-being.