Uranium-238 is a radioactive isotope of uranium that is commonly found in nature. It has 92 protons and 146 neutrons in its nucleus.
The spontaneous breakdown of an atomic nucleus, resulting in the emission of radiation.
Half-Life: The time it takes for half of the atoms in a sample to undergo radioactive decay.
Fission: A nuclear reaction where the nucleus of an atom splits into two or more smaller nuclei, releasing a large amount of energy.