1 Bromo 3 Fluoro 4 Iodobenzene

Mercury, powders, and other materials were used for many purposes in ancient times. The following is in the form of the ancient classical saying:
Mercury, ancient water, use.
Those who use it, often use it to make pills, hoping to be born. Its nature is strange, flowing like water, and solid like gold. The alchemist has a miraculous effect, which can transform ordinary immortals. In the realm of, it is also useful. In ancient times, mercury can be added to the soil to treat diseases such as scabies and raffines, but its nature is poisonous, if you don't pay attention, it will harm the body. It is also used in utensils, which can make the surface smooth and prevent durability.
Those who use powder are derived from ordinary materials and potato. The cooking of rice can make the soup thick and add to the taste. It can be used as a sauce, and the head of the soup can be used to loosen the ground. And the powder can be pasted, used to bond the rice, cloth, and other things. It is indispensable for cooking, repair, and so on.
It is the staple food of the people, and the source of life for the people. Rice, millet, millet, rice, rice, and beans, each have their own. Spring and autumn harvest, people use food to fill their bellies, and keep alive. And the food can be made into wine, and wine can be used to sacrifice the treasures of the guests. Sacrifice to the sky and the earth, the ancestral food, wine and worship; feast for guests, wine can help gather. It can also be used for livestock and livestock fertilizer, and people provide meat and fur, which benefits people's livelihood a lot.

Mercury is a liquid metal that is liquid at room temperature, with a silver-white color and metallic luster. Its density is quite high, about 13.6 grams per cubic centimeter. This property makes it different from many common substances. It is widely used in some special processes and measurements. For example, mercury barometers use their density characteristics to measure air pressure.
Mercury has very good fluidity and can flow like water, but its viscosity is slightly greater than that of water. In terms of electrical properties, mercury is a good conductor. Although its conductivity is not as good as that of metals such as copper and silver, it is also used in specific electrical devices.
Water, a colorless, odorless and transparent liquid, exists stably at room temperature and pressure. Its density is 1 gram per cubic centimeter, which makes water the standard for measuring the density of many substances. The specific heat capacity of water is extremely large, about 4.2 × 10 ³ joules/(kilogram · degree Celsius), which means that when absorbing or releasing a large amount of heat, its temperature change is relatively small, which is essential for regulating the climate and maintaining temperature stability in living organisms. The boiling point of water is 100 ° C and the freezing point is 0 ° C. This property is widely used in daily life and industrial production, such as distillation, refrigeration and other processes.
Tridendron, its shell is thick and heavy, and the surface of the shell is several thick radioactive ribs, which are unique in shape. The shell of the tridendron is hard in texture, and it is a solid barrier to protect itself from external aggression. Its main component is calcium carbonate, which gives it a certain chemical stability. However, it will also react chemically when it encounters acids. And the inside of the clam shell has a beautiful pearl luster, which is often used as an ornament after being carved, and has high ornamental value.

If you want to make mercury, bromine, rivers, and deposits, there are different methods.
The method of making mercury is the ancient technique of burning Dan sand. For Dan sand, mercury sulfide is also. Take Dan sand and put it in a closed vessel and calcine it with fire. Dan sand decomposes when heated, mercury comes out in vapor, and when cold, it condenses into liquid mercury. "Baopuzi" said: "Dan sand burns into mercury, and the accumulation changes into Dan sand." This is also called also.
As for bromine, it may not have been known in the past. Today's bromine production is mostly from seawater or brine. Seawater contains bromide, and chlorine is first added to it. The oxidation of chlorine is stronger than that of bromine, so it can replace bromine ions and obtain an aqueous solution of bromine. Then bromine gas is blown out in the air, and then absorbed by sulfur dioxide, which is converted into hydrobromic acid, which is oxidized by chlorine gas to obtain pure bromine.
The process of making a river is not an ordinary thing that can be made by human labor. The river is also created by nature. The source of water is either the melting of mountains, ice and snow, or the spring, and the streams converge to form rivers.
The system of sedimentation, if it refers to starch. The ancient farmers, take grains, such as rice, wheat, potatoes, etc. Soak them in water first to soften the grains. Then grind them to get a slurry. Filter them with cloth to remove their slag and keep their slurry. Let stand, the starch sinks at the bottom, remove the supernatant, wet starch can be obtained, and the finished product is dried in the sun.
These are all roughly made of mercury, bromine, river and lake, or ancient or modern, the method is different.

When storing and transporting mercury, rivers, rivers, and arsenic, many people should pay attention to it.
Mercury is a liquid metal, which is volatile and its vapor is highly toxic. When storing, it must be stored in a sealed container to prevent the evaporation of mercury from escaping. The material of the container should be solid and have good sealing, such as special glass or metal containers. It should also be placed in a cool and ventilated place, protected from heat and open flames, to prevent the increase of volatile mercury caused by rising temperature. During transportation, it should also be properly packaged to ensure that there is no risk of leakage. The means of transportation used should be smooth to avoid damage to the container due to bumps and collisions.
The water of rivers and rivers, although natural, should be used for specific storage and transportation purposes. When taking water, it is necessary to check its water quality to avoid pollution. The storage container should be clean and non-toxic to prevent secondary pollution to the water body. During transportation, the water should be kept clean and prevent debris from mixing in. It is also necessary to consider the physical properties of the water, such as the effect of temperature changes on its volume and state, to ensure the safety of transportation.
Arsenic, a highly toxic substance. Storage must be in a strong, tight and clearly marked container, placed in a specially guarded and heavily guarded place, and it is strictly forbidden for unrelated personnel to approach. Labels must be marked with the words "highly toxic" to prevent accidental touch and misuse. When transporting arsenic, it is necessary to strictly follow relevant laws and regulations, and choose professional transportation personnel and tools to ensure the safety monitoring of the whole transportation process to prevent any leakage and loss.
All these items should be stored and transported with safety as the top priority, strictly abide by the procedures, and proceed with caution to ensure safety.

Fujiang, rivers, lakes, and moorings, where water gathers, is related to the safety of all people, and the potential safety risks in the meantime cannot be ignored.
The water of the river is surging endlessly, seemingly magnificent, but when the flood is in flood, its power is terrifying. When the summer and autumn rainstorms come suddenly, the river water rises sharply, and the torrent is like a beast, breaking the embankment and submerging the fields, and both humans and animals are spared. In the past, Dayu used to control the water, and he worked hard to solve the suffering of the flood, which shows the danger of the river flood.
Although the waters of the lake are calm, there are also crises. Its depths vary, the underwater terrain is complex, and the water plants are entangled. Or there are bad swimmers who rush into the water rashly, and they are easily fettered by the water plants, and it is difficult to break free, resulting in the danger of And in the hot summer, people like to go to the lake to relieve the heat. If they are not well protected, they are also vulnerable to this disaster.
The pond may seem ordinary, but in fact it is hidden in danger. The pond water may not be dredged for a long time, and the silt is deep, and it is difficult to extricate itself. Also, the surrounding area is mostly slippery, and children play during it, accidentally slip and fall into the pond, and in an instant, there is a worry for their lives.
Therefore, on the banks of rivers, lakes and ponds, warning signs should be set up to publicize safety. Everyone must also be self-disciplined and not take risks, so as to ensure the safety of one party and avoid drowning.