Summary: Offered the elementary static geometric model of nucleus from nuclons with 4 bonds describes the method of nucleus formation and shape-generating clusters, explain main features of fission mass-spectrums, allows to show out discrete of nucleus binding energy formula. Two ways of mass number increase are educed - concentric and linear chainlets of clusters. The Form Distinction of nucleus with a equal nuclon depot looks in a model as the isomeria reason. A possible analogy is indicated between the forms of nucleus and accessible to the supervision by the clusters of amorphous silicon.

The Key Words: nucleus form, tetrahedron, clusters, binding energy.