Microscopic quantum hydrodynamics of systems of fermions: II

A closed system of nonstationary equations for a multielectron atom is cons tructed using a method previously developed for investigating multiparticle fermion systems. The melt-known Thomas-Fermi--Dirac method is a particular case of the system. The exchange spin-spin correlations are calculated usi ng an improved spin-spin interaction Hamiltonian. The dependence of the ele ctron concentration on the self-consistent electric field potential and a d iscrete set of parameters determined by the total energy and the angular mo mentum of the atom is derived for stationary atom states.