both polonium and radium belong to chemical elements. They can emit invisible rays, and they can naturally glow and heat without external force, and release huge energy. The discovery of polonium and radium has attracted great attention from the scientific community, which once caused great changes in science and philosophy, opened the door for human beings to explore the mysteries of the atomic world, and then gave birth to a new discipline-radiochemistry.
In p>1898, French scientists Curie and his wife studied the salts and oxides of more than 8 known elements. When testing the radioactivity of the collected minerals, they found that the radioactivity of pitchblende and copper-uranium-mica ore was stronger than that of pure uranium, and then inferred that another element capable of emitting rays might be hidden in them. When the impurities are removed one by one, the radiation emitted by the remaining small part is 4 times stronger than that emitted by uranium. They named this new element polonium. In December of the same year, the Curies found another unknown element in pitchblende, named "Radium".
polonium is a silvery white metal, which can emit light in the dark. Polonium is more radioactive than radium and can be used as a radioactive source. It is usually used as an alpha ray source in scientific research. Sometimes polonium is also deposited on beryllium and used as a neutron source. In addition, polonium can also be used to eliminate static electricity and as a heat source for space equipment.
Radium is a fluorescent blue or silvery white metal, and it is the most active alkaline earth metal. Radium can quickly react with nitrogen and oxygen in air to form nitrides and oxides, and react violently with water to form radium hydroxide and hydrogen.
when radium emits rays, it can generate a lot of energy. Scientists took advantage of this feature and began to study atomic energy. Under the irradiation of laser rays, substances that can't normally emit cold light can also emit light. For example, colorless glass will become colored, colorless and transparent diamond will become black graphite, and the pointer of the night light meter doped with radium salt can emit yellow and green light. In addition, laser rays can kill malignant tumor tissues and germs, and are often used to treat cancer and skin diseases in medical treatment.