In nuclear fission mass from the neutron and the bombarded nucleus become energy as per this equation
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Basics of Nuclear Physics and Fission - Institute for Energy and ...  The mass of an atom lies almost entirely in its nucleus since protons and neutrons are far ... Free neutrons are unstable particles which decay naturally into a proton and electron, ... decay into other elements, a whole host of radioactive materials come into being. ... Amount of energy released per fission Er = (Bf1 + Bf2)  Bh.
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Physics of Uranium and Nuclear Energy - World Nuclear Association  In nuclei with an odd number of neutrons, such as U-235, the fission cross-section ... fission products such as Ba, Kr, Sr, Cs, I and Xe with atomic masses ... Some Pu-239 nuclei may capture a neutron to become Pu-240, which is less stable. ... In a fast reactor, Pu-239 produces more neutrons per fission (e.g. at 2 MeV: four),...
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Uranium-235 Chain Reaction - HyperPhysics  Form of Energy Released, Amount of Energy Released (MeV) ... If at least one neutron from each fission strikes another U-235 nucleus and initiates fission, then...
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Nuclear fission - Wikipedia  In nuclear physics and nuclear chemistry, nuclear fission is either a nuclear reaction or a ... Nuclear fission can occur without neutron bombardment as a type of ... In nuclear reactions, a subatomic particle collides with an atomic nucleus and .... least ten million times more usable energy per unit mass than does chemical fuel.
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E=mc^2 - Nuclear Fission - Energy from Pulling Atoms Apart  Nuclear fission takes place when a heavy atomic nucleus, such as uranium, breaks into ... atom is converted into energy in accordance with the equation E = mc2. ... be a way to get at the energy locked up in an atom's mass took time to catch on. .... an atom of uranium-235 to undergo fission by bombarding it with neutrons.
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What is Fission? Definition & Facts about Nuclear Energy  Sep 19, 2012 ... When an atom splits into two parts, either through natural decay or when ... Fission is different from the process of fusion, when two nuclei join ... start of World War II, drafted by Hungarian physicist Leo Szilard and signed by ... More commonly, fission is used to generate energy within a nuclear power plant.
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Uranium-235 - Wikipedia  Uranium-235 (235U) is an isotope of uranium making up about 0.72% of natural uranium. Unlike the predominant isotope uranium-238, it is fissile, i.e., it can sustain a ... Uranium metal highly enriched in uranium-235 .... If at least one neutron from U-235 fission strikes another nucleus and causes it to fission, then the chain...
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The mass of the proton and neutron are fine tuned for life  Nuclear scientists measure the mass of protons and electrons in units of millions ... Basic textbooks sometimes say that protons and neutrons have the same mass. ... So the difference between them is small: a neutron is about 1.29 MeV heavier than a proton. ... One of the protons changes into a neutron, forming a deuteron.
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E = mc 2 Explained - PBS  "Energy equals mass times the speed of light squared. ... multiply the mass of that walnut by the speed of light to determine how much energy is bound up inside it? ... year" when he published E = mc2 and four other universe-changing papers.
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Thorium, Chemical Element - reaction, uses, elements, examples ...  One of its isotopes undergoes nuclear fission. Nuclear fission occurs when ... of thorium, thorium-232. Thorium-232 has a very long half life of 14 billion years.
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80 years since discovery of the neutron - Phys.org  Jun 15, 2012 ... Professor Sir James Chadwick's discovery revolutionised nuclear research ... previously unknown particle in the atomic nucleus that was crucial to the fission of uranium 235. ... 'An essential component of the structure of matter' ... understanding of two of the fundamental forces of particle physics, the strong...
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Nuclear fuel - Wikipedia  Nuclear fuel is a substance that is used in nuclear power stations to produce heat to power turbines. Heat is created when nuclear fuel undergoes nuclear fission. Most nuclear fuels contain heavy fissile elements that are capable of nuclear .... Metal fuels have been used in water reactors and liquid metal fast breeder reactors...
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The Discovery of Fission | The Manhattan Project: Making the Atomic ...  Meitner and Frisch's Nature Article: Disintegration of Uranium by Neutrons. Lise Meitner: A Life in Physics. by Ruth Lewin Sime. Otto Frisch. Otto Hahn. Lise Meitner. Fritz Strassmann.
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Nuclear fusion - Wikipedia  In nuclear physics, nuclear fusion is a nuclear reaction in which two or more atomic nuclei .... Fusion reactions have an energy density many times greater than nuclear ... The fusion of nuclei in a star, starting from its initial hydrogen and helium ..... The fusion rate as a function of temperature (exp(E/kT)), leads to the need to...
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Nucleons and Isotopes Homework  _____1) One atomic mass unit is defined as weighing a) 1/16 the mass of O-16 b) 1/12 the mass of C-12 c) 1/32 the mass of S-32 d) 1/10 ... 42. 20Ca. 56. 26Fe. 232. 92U. C) Find the most common isotope for each of the following elements:...
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Uranium-235 - Wikipedia  Uranium-235 (235U) is an isotope of uranium making up about 0.72% of natural uranium. Unlike the predominant isotope uranium-238, it is fissile, i.e., it can sustain a ... Its (fission) nuclear cross section for slow thermal neutrons is about 584.994 barns. For fast neutrons it is on the order of 1 barn. Most but not all neutron...
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Wisconsin Project on Nuclear Arms Control - Nuclear Weapon Essay  The yield of the fusion fuel is increased when the fissile rod in its center reaches a ... As the fusion fuel reacts, it releases high-energy neutrons that also fission the uranium-238 nuclei ... These are called enhanced radiation, or neutron bombs. .... A large portion of the damage caused by a nuclear weapon is from the blast.
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The Discovery of Fission | The Manhattan Project: Making the Atomic ...  The radiochemists Otto Hahn and Fritz Strassmann were bombarding ... equation that the loss of mass resulting from the splitting process must have been...
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Why was Plutonium used instead of Uranium in the "Fat Man" atomic ...  Jul 13, 2015 ... If this happens at the instant that the bomb achieves critical mass then ... out Uranium periodically for processing, the reactor wouldn't even need to ...... being held in, which would have caused the whole thing to go kaboom.
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Basic Nuclear Science Information  Mar 30, 2007 ... The number of protons in the nucleus, Z, is called the atomic number. .... Each particular isotope has its own half-life. ... Fusion is a nuclear process in which two light nuclei combine to form a single heavier nucleus. ... Fission is a nuclear process in which a heavy nucleus splits into two smaller nuclei.
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Nuclear fusion - Wikipedia  The Sun is a main-sequence star, and thus generates its energy by nuclear fusion of hydrogen nuclei into helium. In its core, the Sun fuses 620 million metric tons of hydrogen each second. In nuclear physics, nuclear fusion is a nuclear reaction in which two or more atomic nuclei come ... For larger nuclei, however, no energy is released, since the nuclear force is...