Answers (2) |
jones
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Sep 11, 2006,3:35 am
NUCLEAR FISSON:breaking of two nucleus while they breaking its gives energy
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<br>NUCLEAR FUSION:JOINING OF TWO ATOMS IZ CALLERD FUSION
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Hemajohnson
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Sep 14, 2006,7:44 am
Hi,
<br>Very simply, fission splits a massive element into fragments, releasing
<br>energy in the process. Fusion joins two light elements, forming a
<br>more massive element, and releasing energy in the process. The reason
<br>they both release energy can be understood by examining a curve
<br>called the binding energy per nucleon curve. Since I cannot draw the
<br>curve for you here, I suggest you look it up. Basically, the significance
<br>of the curve is that it has an initial steep increase in binding
<br>energy per nucleon as the number of nucleons increases, reaches a maximum
<br>value, and then decreases gradually as the number of nucleon increases.
<br>In fission, an element with a very large number of nucleons (such as
<br>Uranium) is split, forming two fragments which each have fewer nucleons
<br>(the total number of nucleons is always constant). These fragments
<br>are nearer the maximum of the curve, so the total binding energy
<br>increases. In fusion, very light atoms (before the maximum of the
<br>curve) are fused into a more massive atom, neare the maximum again.
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