An alpha particle is made up of two protons and two neutrons bound together, which gives it a positive charge. It has low penetrating power but can cause significant damage if ingested or inhaled.
Related terms
Atomic Nucleus: The central part of an atom that contains protons and neutrons.
Ionizing Radiation: High-energy radiation that can remove tightly bound electrons from atoms, leading to ionization.
Radioactive Isotope: An isotope of an element that has an unstable nucleus and undergoes radioactive decay.