What particles are released during the decay of radium-226 into radon-222?

During the decay of radium-226 into radon-222, alpha particles are released. This process is known as alpha decay, where the original atom (radium-226) emits an alpha particle, which consists of two protons and two neutrons. This emission reduces the atomic number of the element, transforming radium (atomic number 88) into radon (atomic number 86).

Alpha particles are specifically identified as a type of radiation that carries a positive charge and is relatively heavy compared to beta particles or gamma rays. Their larger mass allows alpha particles to interact more readily with matter, although they have a limited range and can be stopped by a sheet of paper or even the outer layer of human skin. This distinguishing characteristic of alpha decay underlines the nature of the transition from radium-226 to radon-222, facilitating a clear understanding of types of radiation emitted during radioactive decay processes.