Beta particles are high-energy electrons or positrons that are emitted from the nucleus of an atom during radioactive decay.
These are helium nuclei consisting of two protons and two neutrons that are emitted during radioactive decay.
Radioactive decay: This refers to the process in which unstable atomic nuclei release radiation in order to become more stable.
Ionizing radiation: This is any type of radiation that has enough energy to remove tightly bound electrons from atoms, creating ions.