What chemical elements in a freshly built house can damage brain nerves? An additional 50 points wil

60% of the brain is fat, 20% is DHA, fat is made up of C, H, O, N, P, with C being the most important element.

It's all carbon, both in the human body and in nature. The brain is mostly fat.

What is the most urban building in society besides Chinese, and what is the most urban building in China besides Chinese?

3. Chemical symbols and meanings.

1.Several atoms: add a number before the element symbol, and omit "1".

s denotes 1 sulfur atom, sulfur element, sulfur element, 2ca 2 calcium atoms.

2.Several molecules: the chemical formula is preceded by a number (except for a single element symbol).

2H2 o 2 water molecules 2N2 2 nitrogen molecules NSO2 N sulfur dioxide molecules.

3.Several ions: The ion symbol is preceded by a number (the charge number of the ion is marked in the upper right corner, and the value of the charge is equal to its valency).

2s2- 2 sulfur ions, 2ca2 2 calcium ions, 2so4 2- 2 sulfate ions.

noh n hydroxide ions 2fe3 2 iron ions 3fe2 3 ferrous ions.

4.Valency of the element: Marked directly above the element symbol.

Ca2valence of calcium O 2valence oxygen H2O valency of hydrogen in water 1valence.

5.The meaning of "2".

2ca2 The first 2: represents 2 calcium ions, and the second 2: each calcium ion carries 2 units of positive charge.

2h2 o The first 2: represents 2 water molecules and the last 2: There are 2 hydrogen atoms in each water molecule.

The valency of calcium element in 2cao calcium oxide is +2 valence.

Fourth, according to the chemical formula of the calculation.

1.100% quality score for the specified section

2.Mass ratio of each element in the compound: Let the chemical formula be ax by

Element a: Element B Number of atoms a (x) Relative atomic mass of a: number of atoms of b (y) Relative atomic mass of b.

3.The mass fraction of the element is 100% 100%.

4.Mass fraction of the substance 100% 100%.

purity, percentage).

5.The mass of the element The mass of the substance The mass fraction of the element.

6.The relationship between the number relationship and the quality relationship:

The relationship between the number of particles is n A particles and M B particles.

Mass ratio Relative molecular mass of N a : Relative molecular mass of M b.

5. Calculation of the relevant solution.

Note: The solute must be dissolved, undissolved is not part of the solution.

1 Basic formula: solution mass solute mass solvent mass.

2 The following formula must first meet the prerequisite: in a saturated solution at a certain temperature:

Solubility Mass: Solvent Mass: Solution Mass Solubility: 100 g: (100 g Solubility).

3 Solute mass fraction 100% 100%.

In a saturated solution at a certain temperature: the relationship between solubility (S grams) and the mass fraction of solute (p%).

s= p%=

4. In the process of adding water to dilute the concentrated solution, the solute mass remains unchanged (the mass of increased water is m).

Concentrated solution mass Concentrated solution solute mass fraction Dilute solution mass Dilute solution solute mass fraction.

Concentrated solution mass m) Mass fraction of dilute solution.

c. c、h、o、s、n、p

They are the basic elements that make up living things, and there are many of them.

Whatever it is, in ** c h o n p s is the most.

The central nervous system (CNS) is the most important part of the human nervous system, including the brain and spinal cord, and its main function is to transmit, store and process information, produce various mental activities, and dominate and control all human behaviors. (1) Brain The human brain is a spongy nerve tissue weighing about 1,400 grams composed of about 14 billion brain cells. The brain is the main part of the central nervous system, and in terms of structure, it is divided into three parts: the forebrain, the midbrain and the hindbrain, which have different functions.

There are two main functions: sensory and motor.

Yes, general anesthesia is especially obvious, local anesthesia on the face and head and neck also has a great impact, in addition, whether you have heart problems or not, it also has a great impact on your occurrence of the above phenomenon, it is recommended to go to a regular hospital for a comprehensive heart examination

It may be that you are allergic to something like anesthetic, or it may be that you have eaten or been exposed to something before so you will have a reaction, but it is better to go to the hospital for a check-up for the sake of insurance, so that you can rest assured that you don't have to be suspicious and worry.

Fish is rich in amino acids, lecithin, potassium, calcium, zinc and other trace elements, such as catfish, salmon are conducive to brain satisfaction.

Pay attention to the combination of work and rest, don't be too nervous, pay attention to rest, and good luck!

Analysis:

Suggestions: In fact, this situation has no effect on the development of the brain, as long as you can exercise and eat a scientific diet, it can be gradual.

The landlord problem is actually not in a hurry, you can go in two steps. First, you can consider making a second loan for the house in Dongchuan now, and find your intermediary or guarantee company there. Your purpose is to buy a house, and the cost will not be too high.

Second, you can sell the house directly, and as for the loan inside, you can repay it by the person who bought your house. The contract is sufficient.

None of the problems you mentioned about selling a house are a problem!

If you sell a house in Chuandong, if you can't repay the loan, you can ask the buyer to bear it, or ask the intermediary to advance the capital for less than 2 years, whether it is less than 2 years of residence or less than 2 years of real estate certificate? If you have lived for less than 2 years, the difference in business tax is only a little more, and if you have lived for 2 years (the time for opening the natural gas book or deed tax invoice for 2 years, etc., as long as you can prove that you have lived for 2 years), you can reduce the business tax.

It's not as troublesome as you said, the main problem is that the part of the loan you owe to the bank will be advanced and the real estate certificate will be taken out.

There are very few black intermediaries, and when you buy a house, you have to see the person on the real estate certificate, don't give the intermediary package fees, pay taxes and fees, and read clearly when you sign the contract before writing.

I hope you'll be smaller after listening to my advice!

First of all, your house loan in Dongchuan can be transferred together, and the house can be traded in less than two years, although it has to pay taxes, which is nothing more than a high tax point. People who buy a house have a price in mind, as long as they think the house is suitable, they will buy it, and they can buy and sell it through a reputable intermediary.

In addition, if you buy a house in Kunming, it is also recommended that you go through an intermediary to save your worries.

As for the black intermediary consumption trap you mentioned, it is necessary to guard against it, and the total cost of buying a house is generally three major parts: house payment, tax **fee. It's much easier to ask the agent to quote you a total price. Find a few more to compare.