ABSTRACT
The development of high energy physics and chemistry leads to a necessity of seeking for and employing many-particle relativistic equations. A goal of this paper is to propose some relativistic models and to give methods of their solving for heavy atoms. A new relativistic approach in the theory of heavy atoms has been suggested in momentum representation. A scalar relativistic equation as an approximation to the equation system has been suggested, taking into account the spin-relativistic kinematics of atomic electrons.
