No abstract available

[en] The discovery of element No 105 is described. A scheme of the recoil atom collector with the use of filter paper is given. Parameters of the ²⁶⁰105 isotope are listed. Chlorides of the element 105 are highly volatile. Data on ²⁶¹105 and ²⁶²105 isotopes of the element 105 are presented

No abstract available

No abstract available

No abstract available

[en] The information indices, recently introduced for the description of the electronic structure of atoms, are used as a more convenient basis than atomic number (or period number) for correlations with the properties of the chemical elements within the main groups of the periodic table. When the derived equations are extrapolated, the expected values for a number of properties or characteristics of the 113 to 120 transactinide elements are obtained: entropies in the gas and solid state, heats of melting and sublimation, melting and boiling points, first and second ionization potentials, atomic volumes, densities, covalent radii, and orbital exponents. Some corrections to the predictions were made by proceeding from the similarity in the trend of the expected values for elements 113 to 120 and the known data on elements 81 to 88. Some properties of elements 85 to 88, missing from the literature, were also calculated

No abstract available

[en] Experimental and calculational results on relativistic effects in physicochemical properties of elements 104 to 106 and their compounds, obtained since the last School-Seminar at Dubna (1989), are reviewed. The results of comparative thermochromatographic studies of halides of the heaviest elements and their lighter analogs in the Periodic Table are discussed. 35 refs

[en] Properties of 8,979 nuclei ranging from ¹⁶ O to ³³⁹ 136 and extending from the proton drip line to the neutron drip line have been calculated by use of the 1992 version of the finite-range droplet model. The calculated quantities include the ground-state mass, deformation, microscopic correction, odd-proton and odd-neutron spins and parities, proton and neutron pairing gaps, binding energy, one and two-neutron separation energies, quantities related to β-delayed one and two-neutron emission probabilities, β-decay energy release and half-life with respect to Gamow-Teller decay, one and two-proton separation energies, and α-decay energy release and half-life. For 1,654 nuclei heavier than ¹⁶ O whose masses were known experimentally in 1989 and which were included in the adjustment of model constants, the theoretical error is 0.669 MeV. For 371 additional nuclei heavier than ¹⁶ O whose masses have been measured n between 1989 and 1996 and which were not used in the adjustment of the model constants, the theoretical error is 0.570 MeV. We also discuss the extrapolate ability of two other recent global models of the macroscopic-microscopic type, and conclude with a brief discussion of the recently discovered rock of metastable superheavy nuclei near ²⁷² 110 that had been correctly predicted by macroscopic-microscopic models. (author)

No abstract available