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Anonymous users2024-02-061. The role of radium:
Radium emits two types of rays, and produces the radioactive gas radon.
The rays emitted by radium can destroy and kill cells and bacteria. Therefore, it is often used to ** cancer and so on. In addition, the mixed preparation of radium salt and beryllium powder can be used as a neutron radiation source to detect oil resources, rock composition, etc.
2. Hazards
Radium is highly toxic, it can replace calcium in the human body and concentrate in the bones, acute poisoning, can cause bone marrow damage and serious damage to hematopoietic tissues.
Radium introduced
Radium element symbol ra, atomic number 88, atomic weight. The peripheral electronic configuration is 7s2, the density, the melting point is 700, the boiling point is <1140, and it is located in the seventh period, group a. Silvery-white lustrous soft metal.
The first ionization energy kj mol, electronegativity. Chemically active, unstable in the air, easy to combine with nitrogen and oxygen in the air.
It reacts with water to form radium hydroxide (Ra(OH)2) and releases hydrogen. Soluble in dilute acids. The chemical properties are very similar to barium. The chloride, bromide and hydroxide of radium are easily soluble in water, and the sulfate and carbonate are slightly soluble in water.
Radium is known to have a variety of isotopes, and radium-226 has the longest half-life of 1622 years. Radium is highly radioactive, emits two types of radiation when decaying, and emits a large amount of heat (radium per gram per hour, fission to produce hydrogen and nitrogen).
The above content reference: Encyclopedia - radium.
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Anonymous users2024-02-05The effects and hazards of radium are as follows:
The benefit is that radium can emit both rays and produce the radioactive gas radon. The rays emitted by radium can destroy and kill cells and bacteria. Therefore, it is often used to ** cancer and so on.
The hazard is that the human body is exposed to radiation, and with the increase of the radiation dose, some harmful effects occur randomly. For example, it may induce malignant tumors such as leukemia, thyroid cancer, and bone tumors; It can also cause genetic mutations and chromosomal aberrations in the body's genetic material.
Knowledge Expansion:
Radium, the element symbol Ra, is a highly radioactive element that is located in the periodic table of chemical elements in period 7, group IIA, atomic number 88. Pure radium metal is virtually colorless, but when exposed to air, it reacts with nitrogen to produce the black radium nitride (Ra3N2).
All isotopes of radium are strongly radioactive, the most stable of which is radium-226, which has a half-life of about 1600 years and decays into radon-222. When radium decays, ionizing radiation is produced, which causes the fluorescent substance to emit light. It was a new element discovered by Marie Curie, and the discovery of radium made a great contribution to science.
On October 27, 2017, the World Health Organization's International Agency for Research on Cancer (IARC) published a preliminary list of carcinogens, and radium-224, radium-226, radium-228 and their decay products are in the list of a class of carcinogens. Marie Curie discovered a chemical element, radium, chemical symbol RA, atomic number 88, atomic weight, belonging to the periodic family A group, a member of alkaline earth metals and a natural radioactive element.
In December 1898, Marie Curie and Pierre Curie isolated radium chloride from the slag extracted from asphalt uranium ore, and in 1907 they measured the new atomic weight of radium pyran, and in 1910, they made radium metal (white metal) by electrolyzing radium chloride.
The content of radium in the earth's crust is 1 10-9%, and so far it has been found that among the imitation isotopes with a mass of 206 230, except for radium-223, radium-224, radium-226 and radium-228, which are natural radioactive isotopes, the rest are synthesized by artificial methods. Radium is present in all uranium ores, with 1 gram of radium per tonne of uranium ore.
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Anonymous users2024-02-041. Definition of radium:
Radium is a highly radioactive element that is in the periodic table of chemical elements in period 7, group IIA, atomic number 88, element symbol RA.
Radium exists in nature in a chemical state, mainly in a variety of minerals, soils, mineral waters, and seafloor silt. Radium is particularly scarce in nature, accounting for only 8 billionths of the total number of atoms in the earth's crust.
Second, the role of radium:
1. Radium can emit two types of rays, and generate radon as a radioactive gas.
2. The rays emitted by radium can destroy and kill cells and bacteria. It can be used to** cancer, etc.
3. The mixed preparation of radium salt and beryllium powder can be used as a neutron radioactive source to detect oil resources and rock composition.
4. Radium is one of the materials of the atomic bomb.
5. Old-fashioned fluorescent paints also contain a small amount of radium.
6. Actinium can be obtained by neutron bombardment of radium-225.
7. Use radium isotopes to find uranium in paleochannels.
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