The paper discusses a possible variant of the future structure of the D. I. Mendeleev table, based on the hypothesis of the correspondence of the order of distribution of electrons with the increasing charge of the nucleus to the laws of quantum mechanics. For the first time the idea of natural spatial development of the D. I. Mendeleev table structure in the plane perpendicular to the existing plane of the matrix table is put forward, where f elements and their more complex analogues of gf, hgf, ihgf, etc. elements are naturally located. The necessity of introducing quantum numbers of a new generation is indicated. It is shown that the triads of elements are stored in the structure of the table up to large values of atomic nucleus charges. Today it can be argued that the periodic table of D. I. Mendeleev is a consequence of the laws of quantum mechanics, about which at the time of its birth Neither D. I. Mendeleev himself nor his equally great scientist knew practically nothing.