The story of Madame Curie's discovery of radium
In p>1896, Bekkerel, a French physicist and a Chinese physicist, published a work report, which introduced in detail the uranium element he discovered through many experiments. Uranium and its compounds have a special ability, which can automatically and continuously emit a kind of invisible ray, which is different from ordinary light.
It can make photographic negatives sensitive through black paper, which is different from Roentgen rays found by Roentgen, but it can automatically occur from uranium and uranium salts without high vacuum gas discharge and high voltage.
uranium and its compounds constantly emit rays and radiate energy. This aroused great interest in Madame Curie. Where does this energy come from and what is the nature of this unusual ray? Madame Curie is determined to uncover its secret. In 1897, Madame Curie chose her own research topic-the study of radioactive substances.
This research topic has brought her into a new world of science. She worked hard to open up a virgin land, and finally completed one of the most important discoveries in the history of modern science, and discovered the radioactive element radium, which laid the foundation of modern radiochemistry and made great contributions to mankind.
Radium is a highly radioactive element, which is located in the seventh cycle, group IIA in the periodic table of chemical elements, with atomic number 88 and element symbol ra. Pure metal radium is almost colorless, but when exposed to air, it will react with nitrogen to produce black radium nitride (Ra3N2).
all isotopes of radium are highly radioactive, and the most stable isotope is radium-226, which has a half-life of about 16 years and will decay into radon-222. When radium decays, it will produce ionizing radiation, which will make fluorescent substances glow. It is a new element discovered by Madame Curie, and the discovery of radium has made great contributions to science.
Madame Curie's social evaluation
Xiao Farr, President of the Academy of Sciences: Marie Curie, you are a great scholar, a great woman who devoted herself to work and sacrificed for science, and a patriot who always worked for extra responsibilities in war and peace. We salute you. You are here, and we can get spiritual benefits from you. We thank you.
we are proud to have you among us. You are the first French woman to enter the Academy of Sciences, and you deserve it.
Einstein said, "Among all the world celebrities, Marie Curie is the only one who has not been spoiled by fame."