Madame Curie's name is Mary. Mary is a French Polish scientist. She mainly studies radioactive phenomena. It was Mary who discovered radium and polonium. Mary won the Nobel Prize for Physics twice in her life.
What did Madame Curie find
Radium.
In 1898, Madame Curie successfully discovered the element radium, which caused a great stir in the scientific community.
Behind the success, Madame Curie paid a huge price. She suffered a lot of physical damage due to the long-term invasion of radioactive materials, and died of pernicious anemia (caused by radium) in the sanatorium on July 4, 1934.
What is more admirable is that the Curies gave up the benefits they deserved from the discovery of radium (gave up the patent right of radium), which is very selfless. Madame Curie once said: We should not waste this life, should be able to say: I have done what I can do.
The discovery of radium has caused great changes in science and even philosophy, and opened the door for human beings to explore the mysteries of the atomic world.
What is the role of radium discovered by Madame Curie
Radium is a radioactive element with chemical symbol Ra and atomic number 88, belonging to alkaline earth metal. It is one of the rare elements in nature, and exists in the decay chain of uranium and thorium. Radium was discovered in 1898 by French chemists Marie Curie and Pierre Curie.
Radium is very radioactive and can emit alpha, beta and gamma rays. It is a silvery white metal with relatively high density and melting point. Because of its radioactivity, radium has been eliminated in many applications, but in history, radium has been widely used in medicine, industry and scientific research.
In medicine, radium is used as a method to treat cancer. Radium can be directly injected into tumor tissue, and then kill cancer cells through high-energy radiation generated by radioactive decomposition. This method, known as radium therapy, was widely used in cancer treatment in the early and middle 20th century. However, radium is no longer used because of its health hazards.
In industry, radium has been used to produce luminous pigments, such as radiant luminous coatings for watches and aviation instrument panels. Because of its radiation, this pigment can spontaneously emit light in the dark, so it is widely used to read the instrument panel at night. However, in the middle of the 20th century, with the increasing awareness of radiation health hazards, this luminescent coating was gradually eliminated.
Radium has also been used to study nuclear physics, especially to measure the rate of nuclear reaction and decay. Because of its radioactivity, radium can be used to study the behavior and properties of radioactive elements. However, now there are safer methods and technologies to carry out these researches, so the application of radium in this field has been replaced.
Radium used to have important application value in history, but because of the health hazards caused by its radioactivity, it has been gradually eliminated. In today's scientific research and industrial production, there are safer alternative materials and methods that can be used to replace radium.
For example, in medicine, radioisotope therapy has replaced radium therapy. Radioisotope therapy uses radioisotope labeled drugs to kill cancer cells, which can more accurately locate cancer cells and reduce damage to normal cells.
In industry, modern light-emitting materials have been widely used. For example, phosphors can spontaneously emit light in the dark without the use of radioactive materials. At the same time, due to the progress of modern technology, sensors, optical fibers and other devices have been widely used in industrial and scientific research, and these devices have higher accuracy and safer characteristics.
In addition, the radioactivity of radium has also caused serious harm to the environment and human health. Due to its high radioactivity, radium will continuously release radioactive particles, causing groundwater, soil and air pollution. Therefore, the use and disposal of radium must strictly comply with environmental protection regulations and safety regulations.
In general, although radium has important application value in history, its application has been gradually replaced due to the health hazards and environmental pollution problems caused by its radioactivity. In modern scientific research and industrial production, there are already safer and more environmentally friendly alternative materials and methods to choose from, so that humans can work and live more safely.
The discovery and application of radium have both advantages and disadvantages. When a discovery or invention is applied, it begins to have its own independent life grid. Whether they can follow the good or the evil depends on how the world owns them.
How many times did Madame Curie discover radium
Madame Curie spent a total of three years and nine months refining radium and extracted 0.1 grams of radium. During the four years from 1898 to 1902, with unremitting efforts, one tenth of a gram of pure radium salt was finally extracted from dozens of tons of waste residue of uranium asphalt mine, and the atomic weight of radium was measured.
As for the number of times of experiment, Madame Curie herself could not remember, but knew that she would continue to try again after failure.