Radioactivity
What is radioactivity? Radioactivity is spontaneous change of the nuclei of radioactive atoms, which in turn emits radiation. Radioactivity is the property exhibited by the radioactive isotopes of stable elements and all isotopes of radioactive elements, and can be either natural or artificial (man made). ... Natural Radioactivity Natural Radioactivity is energy generated by those radioactive elements that exist in the Earths crust. Radioactivity in nature comes from two main sources, terrestrial and cosmic. ... The Concept Half Life In theory, the decay process is never complete and there is always some residual radioactivity. ... The Different Decay Series Radioactivity creates an equilibrium in parts of the nuclei of unstable radioactive substances, ultimately to form a stable arrangement of nucleons (protons and neutrons); that is, a non-radioactive (stable) element. ... Artificial Radioactivity Radioactivity can be natural or made through human intervention. Neutron Activation is an example of artificially induced radioactivity. It occurs when radioactivity arising from radioactive isotopes or elements that are formed when elements are bombarded with subatomic particles protons, neutrons, or electrons or small nuclei. People have introduced artificial radioactivity into the world on the military front. ... (The splitting of atoms) The treating of brain cancer has also used radioactivity technology.