The periodicity of the chemical properties of elements is associated with the repetition of the configurations of valence electrons with respect to the quantum number l , which dictates the angular distribution of wave functions in the nonrelativistic approximation and, thus, determines the chemical properties. However, for superheavy elements ( Z > 111), which have been successfully synthesized in the last years [1‐4], relativistic effects are crucial and lead to a noticeable violation of simple regularities [5, 6]. In early works on the electronic configurations of superheavy elements [5‐7], configuration interaction was not considered and some calculations were performed by the Dirac‐Fock‐ Slater method with approximate inclusion of exchange, which is less accurate than the Dirac‐Fock method. In this work, we performed multiconfiguration Dirac‐Fock calculations with inclusion of the total angular momentum coupling scheme and the Breit correction. The lowest lying term was taken to be the energy of a given configuration. When these energies for different configurations were very close to one another, configuration interaction was included in the calculations [8]. The calculations covered the elements with 119 ≤ Z ≤ 164. Configuration interaction calculations were necessary since the total energies of different configurations differ little from one another in many cases [5]. Therefore, inclusion of configuration interaction can lead to a change of the ground-state configuration. In particular, it is worth noting that about one half of the ground-state configurations obtained in this work differ from those reported in [7], where no configuration interaction was included and the exchange energy was considered by an approximate statistical method. Dirac‐Fock calculations were performed for many heavy elements [9], but configuration interaction was not included. These data are compared with our data in Tables 1 and 2. This comparison shows that configuration interaction is crucial in more than 30% of cases since its consideration leads to another ground-state configuration. The calculated electronic configurations of some elements (up to Z = 120) were reported in [10‐ 14].