1 Iodo 2 Fluoro 4 Chloro 6 Bromobenzene

Mercury is a highly toxic metal with many unique physical properties. Mercury is liquid at room temperature, which is very rare. It is like flowing silver, which is unique among all metals. Its fluidity is excellent, just like smart water, and it can roll and extend freely on the plane.
The density of mercury is quite high, up to about 13.59 grams per cubic centimeter. Compared with common metals such as iron and copper, the same volume of mercury is far superior in quality. Compared with one cubic centimeter of mercury and iron, the mass of mercury is about 1.8 times that of iron. This density makes it feel heavy.
The surface tension of mercury is also high. It drops on the plane and often aggregates into round and moist mercury beads, which are like pearls and are not easy to disperse. This property makes mercury unique in some special processes and experiments.
Furthermore, the melting point of mercury is -38.87 ° C, and the boiling point is 356.6 ° C. The lower melting point causes it to maintain a liquid state at room temperature; while the relatively high boiling point indicates that a high temperature is required to vaporize it.
Although mercury is a metal, it has good electrical and thermal conductivity and can be used in the fields of electrical and thermal conduction. However, it should be noted that most mercury and its compounds are highly toxic. Once they enter the human body, they can cause serious damage to the nervous system, kidneys, and many other organs. When using and handling mercury, it is necessary to exercise caution and adhere to safety procedures.

Mercury, a mundane water, was also known as mercury in ancient times. Its chemical properties are special.
Mercury is the only gold that exists as a liquid under normal conditions. Its melting temperature is low, -38.87 ° C, and its boiling temperature is 356.6 ° C. This makes it a liquid in general environment, and its shape is special, like a black-colored liquid stone.
Mercury has good chemical properties and has special uses in the field. Its chemical activity is at a moderate level, unlike that of some active gold. It is prone to biochemical reactions of other substances, but it can also be diversified. For example, mercury can be rapidly combined with sulfur to form mercury sulfide, which is especially important in preventing mercury leakage. Sulfur powder can be used to coat mercury droplets to make them dissolve mercury sulfide, which is phase-stable and low-toxicity.
Mercury can dissolve many metals and form mercury. Gold, gold and other metals can form mercury. The characteristics of mercury have been used in metallurgy and other fields. The ancient people used mercury to extract gold and other metals. However, mercury and its compounds are mostly toxic. Once inhaled, mercury vapor can cause serious harm to the body and the like. In the use and management of mercury, extra care should be taken to follow safety standards. Therefore, due to its special chemical properties, mercury not only plays an important role in the study of human life, but also plays a very important role due to its toxicity.

If you want to make compounds of one, two, four, and six, there are many methods. You can consider "Tiangong Kaiwu", which is briefly described as follows:
One is extracted from natural things. Between mountains and rivers, there are mineral veins hidden in the ground. If you look for the genera of one or two, or you can find it in some ores. If you want to get a pure quality containing one, you can find a specific stone, which is crushed, ground, and washed with water. By virtue of its density difference, the impurities are removed and the essence of one is stored. As for the composition of two, or it is stored in a certain type of ore, after roasting, the composition is converted, and then leached with an appropriate solvent, a solution containing two can be obtained. Subsequent evaporation, crystallization, etc. to obtain a pure two.
Second, the way of chemical synthesis. If you want to make four or six things, you can use chemical reactions to do it. If you use common substances as raw materials, mix them in a certain ratio. If you start with two compounds, A and B, react at a specific temperature and pressure. Temperature control is extremely critical. If the temperature is too high or too low, it will affect the process of the reaction and the purity of the product. During the reaction, a catalyst may be added to accelerate the reaction, but the amount of catalyst also needs to be precisely controlled. The mixed products generated by the reaction are then separated and purified, such as distillation and extraction, to obtain pure four or six products.
Third, the method of biological assistance. Each living thing in the world has its own wonderful ability. Some microorganisms can be found, which can generate things related to one, two, four, and six during the process of growth and metabolism. Create a suitable environment for microorganisms to multiply and produce a large number of required ingredients. After collecting and processing the biological culture liquid, centrifugation, filtration and other means are used to extract the target substance.
Fourth, the method of physical transformation. For some substances, the shape or structure can be changed by physical force to achieve the purpose of generating one, two, four, and six. For example, conditions such as high pressure and strong magnetic field are applied to promote the rearrangement of the internal structure of the substance, or change its aggregation state, so as to realize the transformation and synthesis of components.

In "Tiangong Kaiwu", saltpeter, alum, turmeric sand, etc. are used in many fields.
Saltpeter, in the military field, can be used to make gunpowder, which is an important lethal weapon raw material in ancient warfare. In the medical field, its salty, bitter, cold, has the effect of moisturizing dryness and softening, and can be used to treat certain diseases. In alchemy, saltpeter is also a key thing, and alchemists often use its properties for alchemy.
Alum, for example, in the paper industry, can make paper easy to write and increase paper toughness. In food processing, it can be used to purify water, precipitate impurities in the water, and obtain relatively clean water; when pickling food, an appropriate amount of alum can play a role in preventing corrosion and maintaining food brittleness. In the printing and dyeing industry, alum can be used as a mordant to help dyes better adhere to fabrics.
In the field of medicine, it can be used to treat sores, swelling, scrotum and other diseases, and has certain corrosion and detoxification effects. In metal smelting, sand can be used as a flux to reduce the melting point of ore, which is conducive to metal refining and improves smelting efficiency.
To sum up, saltpeter, alum, and turmeric sand play an important role in many fields such as military, medicine, papermaking, food processing, printing and dyeing, and metal smelting, demonstrating the ancient Chinese people's in-depth understanding and skillful use of these material characteristics.

Looking at the market prospects of sugar, wine, salt, sauce and vinegar in places 1, 2, 4, and 6 today, it can be said that opportunities and challenges coexist, and the rise and fall of the phenomenon cannot be hidden in one word.
In terms of the sugar market, the need for sugar for the people of the world has not declined for a long time. Whether it is a restaurant in the market or a kitchen in a wealthy family, it is indispensable. In addition, there are frequent business exchanges between the four sides, and the circulation of sugar goods is far-reaching. Of course, the sugar industry is also constrained by the right time and place. If the sky does not bless, drought and floods are plagued by insects, and the production of sugar cane, sugar beets and other raw materials is reduced, the price of sugar will rise. And the competition in the same industry is becoming increasingly intense, and sugar merchants are using their own means to compete for market profits. Therefore, although the sugar market has vast prospects, risks
As for the wine market, the Chinese wine culture has a long history, and there are wine in feasts, receptions, sacrifices and celebrations.
The officials and dignitaries have good wines to show their status, and the merchants and soldiers also like thin wine to relieve their hard work. The methods of brewing wine vary from place to place. Famous wines are produced in large numbers and fragrant, attracting guests from all over the world to compete for them. However, there are also hidden worries in the wine market. There are many regulations on the production and sales of wine in the laws and decrees. If they violate them, there will be disasters. And the trend of health preservation is gradually flourishing, and some people are afraid that wine will hurt their bodies, and the demand for wine may be reduced.
The situation of the salt market is related to the livelihood of all people. It is important for the court, and it is often a monopoly system. Salt is the first of all flavors, and people cannot lack salt Although the production area is limited, it depends on the overall deployment of the government to sell the world, and there is no risk of unsalable sales. However, salt policy also needs to be clear. If officials are greedy for ink and private salt is rampant, it will disrupt the market and endanger people's livelihood and the country's taxes.
The city of sauce and vinegar adds color and flavor to the daily diet, and it is a must at home. The terroir is different in different places, and the flavor of sauce and vinegar is also very different, and each has its own fans. The production process of sauce and vinegar depends on inheritance. Those with excellent quality have a long reputation and smooth sales. However, it is also facing the impact of new things, and the products from the West are gradually entering the Middle Earth, or their market share.
To sum up, although the sugar, wine, salt, sauce and vinegar markets in the regions of 1, 2, 4, and 6 all have deep roots and broad prospects, they all need to adapt to the current situation and meet challenges in order to establish a stable position in the tide of business and seek long-term profits.