nuclear.
2006-11-13 03:58:10
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answer #1
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answered by Anonymous
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It is a reaction that happens at the atomic level. It could be fussion, where 2 or more atoms combine and release energy - the sun is a fussion reactor, it combines hydrogen to produce helium. A fission reactor splits a molecule apart and releases energy. An atom bomb is a fission reaction. A lump of, say plutonium, is compiled together until it reaches critical mass,a point where the surface is no longer large enough for the volume to allow radiation to escape, so it collides with another atom and splits the atom apart.
2006-11-13 04:08:12
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answer #2
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answered by Anonymous
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In nuclear physics, a nuclear reaction is a process in which two nuclei or nuclear particles collide, to produce different products than the initial particles. In principle a reaction can involve more than two particles colliding, but such an event is exceptionally rare. If the particles collide and separate without changing, the process is called an elastic collision rather than a reaction.
A nuclear reaction can be represented by an equation similar to a chemical equation, and balanced in an analogous manner. Nuclear decays can be represented in the same way.
Each particle taking part in the reaction is written with its chemical symbol, then atomic number subscripted, and atomic mass superscripted. The neutron and electron, not being chemical elements, are given the symbols n and e respectively. The proton may be denoted by "H" (as a hydrogen nucleus) or as "p".
To balance the equation, we must ensure that the sum of the atomic numbers on each side of the equations are equal (required by the conservation law of electric charge), and that the sum of the atomic masses on each side are also equal (required by the law of conservation of baryon number).
There are 2 types of Nuclear Reactions:
1.Fusion
2.Fission
In physics, nuclear fusion is the process by which multiple nuclei join together to form a heavier nucleus. It is accompanied by the release or absorption of energy depending on the masses of the nuclei involved. Iron and nickel nuclei have the largest binding energies per nucleon of all nuclei and therefore are the most stable. The fusion of two nuclei lighter than iron or nickel generally releases energy while the fusion of nuclei heavier than iron or nickel absorbs energy; vice-versa for the reverse process, nuclear fission.
Nuclear fission—also known as atomic fission—is a process in nuclear physics in which the nucleus of an atom splits into two or more smaller nuclei as fission products, and usually some by-product particles. Hence, fission is a form of elemental transmutation. The by-products include free neutrons, photons usually in the form gamma rays, and other nuclear fragments such as beta particles and alpha particles. Fission of heavy elements is an exothermic reaction and can release substantial amounts of useful energy both as gamma rays and as kinetic energy of the fragments (heating the bulk material where fission takes place).
Nuclear fission produces energy for nuclear power and to drive explosion of nuclear weapons. Fission is useful as a power source because some materials, called nuclear fuels, both generate neutrons as part of the fission process and also undergo triggered fission when impacted by a free neutron. Nuclear fuels can be part of a self-sustaining chain reaction that releases energy at a controlled rate in a nuclear reactor or at a very rapid uncontrolled rate in a nuclear weapon.
The amount of free energy contained in nuclear fuel is millions of times the amount of free energy contained in a similar mass of chemical fuel such as gasoline, making nuclear fission a very tempting source of energy; however, the waste products of nuclear fission are highly radioactive and remain so for millennia, giving rise to a nuclear waste problem. Concerns over nuclear waste accumulation and over the immense destructive potential of nuclear weapons counterbalance the desirable qualities of fission as an energy source, and give rise to intense ongoing political debate over nuclear power.
2006-11-13 04:08:42
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answer #3
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answered by Charu Chandra Goel 5
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Any reaction occuring within or between nuclei of atoms.
2006-11-13 04:12:48
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answer #4
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answered by Radagast97 6
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It is an exothermic reaction.
2006-11-13 04:03:59
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answer #5
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answered by Anonymous
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I think the answer to your question is in your question.
2006-11-13 04:00:09
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answer #6
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answered by Redawg J 4
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a very hot one
2006-11-13 04:00:23
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answer #7
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answered by krusty_blue_spaz 5
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