Ideal chain model
The Ideal chain model is a polymer that is built up of ideal gas like monomers forming a chain having a fixed bond length. The monomers have zero excluded volume, so they are free to overlap with impunity. Given that, a snapshot of a configuration of an ideal chain having bonds will look exactly like the the result of steps of a random walk.
The end-to-end vector, is given by the sum of the individual bonds, i.e. . The average of this vector will be zero.
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