In 1920 the Rutherford has offered a structure of a neutron in the form of a proton and close located orbital electron. The neutron, as is known, has been discovered only in 1932, i.e. in 12 years. Such representation of a neutron predetermined also proton-electronic model of a nucleus of atom.

However then it was necessary to refuse model from the Rutherford, since it contradicted established facts:

• Quantity of a spin of many nuclei of atoms was not equaled to the total of quantities of spins of protons and the electrons presumably entering into its composition.
  For an example, nucleus of Beryllium consisting of 9 nucleons and having a charge +4 was given. On proton-electronic model, the nucleus should consist of 9 protons and 5 electrons. The total spin of a nucleus consisting of 14 particles with a spin equal h/2, should be the whole.
  Actually the spin of this nucleus half-integer also are equal 3/2h.
  
  
• If nuclei of atoms contained electrons, moments of magnet of nuclei would have quantities of the order of an electronic magneton of Bohr.
  Actually they approximately in 2000 times it is less.