cu elementCopper was a chemical element with an atomic number of 29. It was an important transition metal element in the fourth cycle of the periodic table.
Under normal temperature and pressure, the appearance of pure copper is rose red, shiny, malleable, odorless, and purple-red when the surface is oxided. Its density is 8.89 g/cm 3 (20 ° C), melting point is 1083 ° C, and it has excellent electrical conductivity, thermal conductivity, corrosion resistance, and good malleability. It can be used for various cold and hot processing. Copper in nature mainly exists in three valences: Cu, Cu2, and Cu3. Among them, the compound of Cu2 is generally white or colorless. Solid copper has high thermal stability, but it is extremely unstable in solution, easy to be oxided or reduced, and its complex has low dissolution. In nature, copper mainly exists in the form of Cu2, which is stable under the conditions of strong oxidization. The compound of Cu3 has strong oxidisation, but its stability is poor.
Copper had little activity and was relatively stable in dry air at room temperature. In humid air, it would react with carbon dioxide and water to form copper rust (verdigris). Under certain conditions, it can react with oxygen, acid, hydrogen, cyanides, and sulfur.
Copper was one of the oldest metals and an important material for the development of civilization. It was widely used in electronics, electricity, transportation, machinery manufacturing, national defense industry, food, agriculture, and other fields. From a historical point of view, as early as 6,000 B.C., copper was used in Anatoria, and around 2,000 B.C., metal smelting technology spread to all parts of the world.
In terms of biology, copper was a trace metal element in the body. It could be absorbed from seafood, organs, meat, grains, water, and other foods. It was absorbed by the small intestine, transported to the liver for metabolism, and then transported to various tissues and organs through the blood. Copper acts as a catalyst and structural cofactor for the corresponding zymes in the body, participating in processes such as oxidoreduction, energy generation, cell metabolism, signal transmission, etc. It also plays a role in cell death mechanisms such as cell death, cardiovascular stress, and copper death. It was also involved in iron metabolism, the formation of colloid, and was a component of many membranes (such as sod and copper-and-zinc-sod), helping to neutralize free radical molecules and maintain cell health. However, excessive copper could cause damage to the body. For example, in patients with diabetes, the imbalance of copper balance would lead to an increase in oxidoxin stress and damage to the anti-oxidoxin mechanism, stimulating the production of inflammatory neurotransmitter and inflammatory factors, thus affecting the occurrence and development of complications of diabetes. It was reflected in complications such as diabetes, myocardipathy, glomerulonepathy, anorexia, and inflammation. In addition, the copper element in preserved eggs should also be taken in an appropriate amount. Overconsumption may be risky for pregnant women, children and other special groups.
"The Island of Life" is also a wonderful novel. Everyone is welcome to read it!
Lethal PositionThere were some fatal spots in the human body. The following were some common ones:
1. ** Back of the head **: The foramen magnum at the back of the head lacks bony structures. It contains the life center of the brain stem, which manages important life support functions such as breathing, circulation, and heartbeat. There are also twelve pairs of skull nerves that manage many important functions in the head and neck. Once they suffered from trauma, they might suffer from brainstem symptoms such as paralysis and swallowing difficulties. In serious cases, they might be in a long-term coma, vegetative state, or even death. Even if the skull was hard, when the human body lost consciousness and lacked self-protection, the force exerted on the back of the head could easily lead to primary brain injury, including contrecoup injury.
2. [Liver: As the " chemical factory " of the human body, it is responsible for the metabolism and transformation of substances in the body.] There was a dense neural network deployed around the liver. When it was hit hard, the intense pain would spread throughout the whole body, making it unbearable.
3. [Kidney: It is the " water purifier " of the human body. It is responsible for filtering the waste in the blood to maintain the stability of the internal environment.] There was a dense " alarm system " set up around the kidney, and any impact would cause severe pain.
4. ** Male tesicles **: Although it is not a necessary organ to maintain life activities, it carries the important mission of reproduction. The human nervous system gives it a very high " pain priority ". A slight collision will cause unbearable pain and may even cause shock.
5. ** Female ovaries **: It is an important reproductive organ for women, responsible for producing eggs and secreting hormones. There was also a dense " alarm system " around the ovaries. An impact would cause severe pain, which could be life-threatening in severe cases.
Read the manga "Hidden for a Hundred Days, I Married the Female Empress of the Enemy Country" by clicking on the link below.
Which element symbol is 'cu'?Copper was the symbol for the copper element. Copper was a chemical element with an atomic number of 29. It was an important transition metal element in the fourth cycle of the periodic table. Under normal temperature and pressure, it is a rose-red, lustrous, malleable, odorless metal, and its surface is purple-red when it is oxided. Its density is 8.89 g/cm 3 (20 ° C), melting point is 1083 ° C, and it has excellent electrical conductivity, thermal conductivity, corrosion resistance, etc. In nature, it mainly exists in three valences: Cu2, Cu2, and Cu3. Copper was widely used in electronics, electricity, transportation, machinery manufacturing, national defense industry, and other fields. It was also used in food, agriculture, and other fields.
"The Island of Life" is also a wonderful novel. Everyone is welcome to read it!
le falta su traducion en español para poder ser mejor y tener más personas al leerlo , y de ay te saldrán mejores ideas por que los de España saben dar buenas ideas