Which of the following is one way that nuclear reactions differ from chemical reactions? How absorbing neutrons in the fission of Uranium 235 prevents an uncontrolled chain reaction Perhaps the most notable nuclear reactions are the nuclear fusion reactions of light elements that power the energy production of stars and the Sun. Controlled nuclear chain reactions ____. A nuclear chain reaction occurs when one nuclear reaction causes an average of one or more nuclear reactions, thus leading to a self-propagating series of these reactions. D. are characteristic of atomic bombs. curium-246 combining with carbon-12 to form nobelium-254 and four neutrons. One of the most well-known and useful examples of a chain reaction is of U 235 which is used to harness nuclear energy. To maintain a sustained controlled reaction, for every 2 or 3 neutrons released, only one must be allowed to strike another uranium nucleus. Fusion. Once ignition is achieved, there is net energy yield – about four times as much as with nuclear … Below is a simple fission process: ... applies to nuclear fusion? Of the following reactions, which is a fusion reaction? C. never produce radioactive by-products. Chain Reaction. Chain Reactions are basically fission reactions which through the products produce more chain reactions. It takes place in the sun. If the particle that starts a nuclear reaction is also one of the products, the process is a. For U 235 on average 2.5 neutrons are emitted, starting on average two more fission reactions. A reaction that results in the combining of smaller atomic nuclei is. Nuclear reactions are controlled by a neutron-absorbing material, such as graphite. The experiment took place at the University of Chicago’s football stadium under the … Controlled Nuclear Fission. Question: Controlled nuclear chain reactions A. take place in nuclear reactors. Nuclear fusion, process by which nuclear reactions between light elements form heavier elements (up to iron). The most notable man-controlled nuclear reaction is the fission reaction which occurs in nuclear reactors. On December 2, 1942, the world’s first self-sustaining, controlled nuclear chain reaction took place paving the way for a variety of advancements in nuclear science.. B. are always fusion reactions. Natural nuclear reactions occur also in the interaction between cosmic rays and matter. Examples of these components are 3-He, 6-Li and 10-B that are currently considered in potential fuel cycles of the controlled nuclear fusion. -- controlled chain reactions take place in nuclear reactors & release energy at a steady rate. If this ratio is less than one then the reaction will die out; if it is greater than one it will grow uncontrolled (an atomic explosion). Which statement correctly applies to controlled nuclear chain reactions? 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