As is known, at -decay of particles, the electron always takes off only together with , and a positron - together with .

Also it is known, that a spectrum of energies of the above-stated taking off leptons not chaotic, but smoothly varying and in pairs interdependent.

From here it is possible to make the first guess, as inside of the broken particle the specified leptons were in pairs together. Probably not only during the moment of decay, but also all previous time.

The basic structural element in offered model of particles is the orbital electron with electronic antineutrino in an orbit around of it. In the text it will be designated as .
To it there corresponds the basic structural antielement, symmetrical to a basic element - an orbital positron with electronic neutrino in an orbit around of it - .
Spin, both , and a , it is equal to zero. It follows from -decay of a neutron and -meson, since the remained massive particles as a result of decay do not change the spin. Inside of a composite particle both pairs of leptons behave terrain clearancely equally. It is supposed, what exactly from and , as from bricks, composite particles are constructed all (i.e. all particles which it is heavier than leptons) Note:    1. On all pages of a site, including the first page, is shown is disproportionately big, concerning the compound particle, where its is a component. It is made only for presentation. If to believe arithmetics, its size should be the order of 10-58m, that the size of the smallest compound particle - muon, is estimated by same arithmetics in 10-17m. I.e. - practically is a dot, concerning any compound particle.    2. Gravitation in is how much strong? At distance in 10-58m, under the law of Universal gravitation, force of an attraction of the antineutrino to the electron (or the neutrino to the positron) in will be the order of 1038 newtons.