Why the higher the floor, the lower the radon concentration 10

Is there too much density in middle school physics?

The chemical element radon, also known as anon, is a chemical element. The usual elemental form of radon is radon gas, which is a colorless, odorless, tasteless, inert gas that is radioactive. The chemical reaction of radon is not active, and it is difficult for radon to react with other elements to become compounds.

Radon has no known biological effects. Because radon is a radioactive gas, when inhaled, the alpha particles that decay in radon can cause radiation damage to the human respiratory system and cause lung cancer. And the building material is the most important indoor radon**.

Granite, masonry, cement and gypsum, especially natural stone containing radioactive elements, are the most likely to release radon.

Hazards: 1In many countries, radon is the second most important type of lung cancer**.

2.Based on the average radon level in a country, radon is estimated to cause between 3% and 14% of all lung cancers.

3.Radon is more likely to cause lung cancer in smokers and is the leading cause of lung cancer among non-smokers**.

4.Radon-induced lung cancer is mainly caused by low to moderate concentrations, rather than high concentrations, of radon, because many people are exposed to this low concentration of indoor radon at home.

5.The lower the radon concentration in your home, the lower the risk. [9]

6.For most people, most of the radon exposure comes from the home. The concentration of radon in your home depends on:

the amount of uranium in the rocks and soil of the foundation; pathways for radon to enter the home; The rate at which indoor and outdoor air is exchanged, depending on the structure of the house, the ventilation habits of the occupants and the degree of sealing of the windows. [10]

7.Radon enters the home through cracks in the junction between the concrete floor and the wall; crevices in the ground; small holes in hollow brick walls; Sinkholes and sewers. Radon levels are usually higher in basements, cellars, or other structural areas that come into contact with soil.

8.Radon concentrations in neighbouring houses can vary from day to day and from hour to hour within a house. Given this fluctuation, estimating the annual average concentration of radon in indoor air requires a measurement of the average radon concentration for at least three months.

Most countries use indoor air radon concentrations of 200-400 bq m3 as reference levels, beyond which mitigation measures should be implemented. [10]

9.Radon-222 is a toxic nuclide that can cause lung cancer and severely damage the kidneys when it enters the human body through the respiratory system. The maximum permissible allowable radioactive concentration of radon in the air of a radioactive workplace is becoliters.

2] It is important to note that the toxicity is caused by the particles produced by the radiation and is not caused by chemical properties.

That is, there is radiation.

Radioactive gases.

Question: Five Poisons? Or is it non-toxic?

1. The deterministic effect is as follows: when exposed to high concentrations of radon, blood cells change in the body. Radon has a high affinity for human fat, especially when radon is combined with the nervous system, which is more harmful.

2. The random effect is mainly manifested in the occurrence of tumors. Since radon is a radioactive gas, when inhaled, the alpha particles produced by the decay of radon can cause radiation damage to the human respiratory system and induce lung cancer.

Question: Can I go to the radon hot springs?

However, the amount in the hot springs is negligible.

It's okay to do it once or twice, don't just soak it for a long time every day.

Question: Is there any harm in soaking in radon hot springs twice once in a while?

It's okay not often.

What are the benefits of asking questions?

Soaking in the hot springs removes moisture from the body.

Soaking in the hot spring is to relax and relax, and it will not make a big change in the body.

How do you rate five stars?

Radon is a radioactive gas that causes damage to humans through internal irradiation. Radon is found in construction cement, slag bricks and decorative stones, as well as in soil.

In the United States, when building a new house, the soil of the site is measured for radon to determine the level of radon in the area. If the standard is exceeded, the builder is advised to relocate and avoid the high radon zone. The harm of radon, a radioactive substance, to the human body has always been attached great importance abroad.

In the United States, the third week of October is designated as Radon Awareness Week to remind people of their vigilance against radon hazards. China has also formulated a national standard for radon content, which is less than 100 becques cubic meters for new houses and less than 200 becques cubic meters for old houses. Radon's main harm to the human body is lung cancer, which is the second most common cause of lung cancer after smoking**.

Hazards: When the human body inhales radon, the radon progeny produced by decay is in the form of particles, which will be inhaled into the respiratory system and accumulate in the lungs, and after precipitation to a certain extent, these particles will damage the alveoli and then lead to lung cancer;

Radon is the main natural radioactive element in the air, and its monoatomic molecule diameter is about 10nm, colorless and odorless. It has been confirmed that radon gas and its progeny are one of the main risk factors causing lung cancer in humans, mainly in building stone, marble, basements, houses adjacent to basements, sealed rooms, etc.

After radon gas enters the lungs, it decays into radioactive isotopes of polonium, lead, and bismuth, which attach to the surface mucosa in the form of metal ions, causing damage to cells.

Nineteen carcinogens identified by the International Agency for Research on Cancer of the World Health Organization:

1, arsenic 2, asbestos 3, monoaminobiphenyls, 4, benzene 5, biphenyl ammonia.

6. Chloronaphthalene 7, dichloromethyl ether and industrial grade chloromethyl ether 8, chromium and some chromides.

9. Ethylene hemorphol 10, radioactive radon 11, L-phenylalanine nitrogen mustard.

12. Mustard gas 13, naphthalene amine 14, coal tar and mineral oil 15, chloroethylene.

16. Conjugated estrogen 17, gold amine manufacturing process 18, strong acid treatment process made of isopropanol 19, nickel smelting process.

Radon is a radioactive gas, and when inhaled, the alpha particles of radon decay can cause radiation damage to the human respiratory system and cause lung cancer.

Radon is toxic, radioactive gas is carcinogenic.

Radon hot springs refer to hot spring water that contains the element radon.

Radon hot springs are mineral springs with low salinity and are rich in radon. Radon does not bind to other elements, is soluble in water, but also soluble in oil and fat, the mass is heavier than air, the higher the water temperature, the lower its solubility, and easy to escape from water and dissipate in the air. Radon disappears completely after 30 days and is not toxic to the body.

Let's unveil the mystery of radon hot springs.

The effects and efficacy of radon

Radon (RN) is a very rare silent, odorless, colorless gas element in nature, is a weak radioactive gas produced by radium in the process of metamorphosis, radon itself is an inert gas, does not combine with other elements, the mass is heavier than air, soluble in water, oil, fat, and more soluble in air. The amount of radon in water is affected by the water temperature, the higher the water temperature, the lower the radon content, the half-life of radon is days, and the radioactivity decreases after decay. Radon can also continue to metamorphose, in the process of metamorphosis, continue to emit biological effects, rays, when metamorphosis to radium d and subsequent progeny products are meaningless.

According to the standards of China's health department for medical hot springs, radon content greater than 15 eman liters is a medical hot spring, which can produce some significant physiological effects on the human body. Modern scientific research has shown that radon in hot spring water has a special effect on promoting human health and various diseases.

According to relevant experts, radon water hot spring is a kind of health care spring, is a rational choice for life fuel, for a variety of arthritis, disease, gout, hypertension, thrombotic vein, tracheitis, neurosis, stomach and duodenitis and other more than 10 kinds of chronic diseases have significant efficacy, is irreplaceable by any synthetic drugs. Radon is a gas that, when it enters the human nervous tissue and metabolism, helps to promote the metabolism of human tissues and the body, can balance female secretion disorders, maintenance and beauty, helps sleep, reduces tiredness and pain.

At present, there are three types of radon hot springs in China: first, low radon springs, and the radon content in the hot spring water is less than 10nci L (370bq L); 2. Radon springs, the radon content in the hot spring water is 10-30nci l (370bq l--1110 bq l); 3. High radon springs, the radon content in the hot spring water is more than 30nci L (1110 BQ L). Most of the hot springs in China are low radon hot springs, and the salinity is also low.

Expert's statement] Xian Hanlong, a trace element expert and former deputy director of the Trace Element Mineral Spring Analysis and Testing Laboratory of Sun Yat-sen Medical University, believes that radon hot springs have a great effect on the human body and can anti-aging; Second, you can go to age spots, age spots are the best disease; Trinity**.

After soaking in the radon hot springs and going to sleep, you can wake up the next day and find that the fatigue is gone.

Radon is recognized by the medical community as a recognized human carcinogen; To date, there is no evidence that radon has any benefits for human health; There is no safety threshold for radon; All professionals recommend that you stay as far away from radon as possible, and that the lower the concentration of radon in your environment, the better, and that you never see each other in this life!