- The forces are complicated and there is no exact mathematical expression that accounts for the nuclear force, in fact, can't be written down explicitly in full detail like electromagnetic or gravitational force. - The nuclues is actually a many-body problem of great complexity and there is no mathematical solution to the many-body problem. So, in the absence of a comprehensive nuclear theory, we turn to the construction of nuclear models. Thus nuclear models, are amongst the several theoretical descriptions of the structure and function of atomic nuclei or in other words it is simply a way of looking at the nucleus that gives a physical insight into as wide a range of its properties as possible. The usefulness of a model is tested by its ability to provide predictions that can be verified experimentally in the laboratory. It should be mentioned that each of the models is based on a plausible analogy that correlates a large amount of information and enables predictions of the properties of nuclei. What is that mean is the following.. You observe some properties of a nucleus and as according to that you device a model which will only describe those behaviour..........
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