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Learn how Otto Hahn, Lise Meitner, Fritz Strassmann and Otto Frisch discovered that the nucleus of an atom can split into two or more smaller nuclei and release energy. Explore the history of radioactivity, neutron bombardment, fission products and the role of uranium-235.
Nuclear fission is a reaction in which the nucleus of an atom splits into two or more smaller nuclei, releasing large amounts of energy and neutrons. Learn about the discovery, mechanism, products, and uses of fission for nuclear power and weapons.
A nuclear chain reaction is a self-propagating series of nuclear reactions, such as fission, that release large amounts of energy. The web page explains the history, process and applications of nuclear chain reactions, and provides examples and references.
An atom is the smallest particle of an element that has the same chemical properties as the element. It consists of a nucleus of protons and neutrons, surrounded by electrons. Learn about the history of atomic theory, the structure and properties of atoms, and how they form compounds.
Ernest Rutherford was a New Zealand physicist who discovered the proton in 1917 by bombarding nitrogen nuclei with alpha particles. He also developed the Rutherford model of the atom and the atomic numbering system, and won the Nobel Prize in Chemistry in 1908.
Learn how the concept of atoms evolved from ancient philosophy to modern science, and how different scientists contributed to the development of atomic theory. Explore the laws, models, and experiments that shaped the understanding of matter and its composition.
A nuclear reaction is a process in which two nuclei or a nucleus and an external particle collide to produce one or more new nuclides. Learn about the history, types, equations, and conservation laws of nuclear reactions, and see examples of nuclear fission and fusion.
Learn about the atomic fragments left after a large nucleus undergoes nuclear fission, and their radioactive decay and energy release. Find out the formation, decay, and yield of fission products, and their applications and hazards.