What is an Alpha Particle?

Alpha particles are particles emitted when certain radioactive materials decay. They consist of two neutrons and two protons (helium-4). They have a mass four times that of hydrogen atoms and can reach a speed of 20,000 kilometers per second. . It does not penetrate very much and can harm the skin of animals.

Alpha particles

If humans inhale or eat with alpha particles

Alpha particles

Alpha particle is a kind of radioactive particle, which is composed of two protons and two neutrons, without any electrons, that is, the core equivalent to helium-4 or ionized helium-4, He2 +. Chemical elements that are usually radioactive and have a large atomic weight will emit alpha particles through alpha decay and become lighter elements until the element is stable. Because alpha particles are relatively large and carry two positive charges, they can easily ionize other substances. Therefore, its energy is also dissipated faster, and its penetrating ability is the weakest among many ionizing radiations. Human skin or a piece of paper can block alpha particles.

The radioisotopes released by alpha particles do not pose a danger outside the human body. However, once alpha particles (radium, uranium, etc.) are inhaled or injected, it will be very dangerous. It can directly destroy cells in the viscera.