Alpha decay

Alpha decay

Alpha decay is a kind of radioactive decay (nuclear decay); when alpha decay occurs, an alpha particle will be ejected from the nucleus (Note: alpha particle, also known as alpha particle, that is helium-4 nucleus, ⁴₂He, that is, a particle composed of 2 A nucleus composed of two protons and two neutrons); After alpha decay occurs, the mass number of the nucleus will be reduced by 4 units, and its atomic number will also be reduced by 2 units.