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[en] New developments have opened the possibilities to extend the chemical studies of the heavinest elements in the transition region from lawrencium to the transactinide elements

[en] A rapid method for continuous separation of short-lived tungsten isotopes from the lanthanides has been developed. It consists in transforming nuclear reaction products from the target by an aerosol jet to an absorber where the KCl particulates are dissolved in 0.2 M HF and percolating the product solution through three successively linked columns filled with ion exchange resins Dowex 50X8 (cationite), Dowex 1X8 (anionite) and again Dowex 50X8. 3 refs

[en] Analysis of the data on gas chromatographic and thermal chromatographic behaviour of transition metal oxychlorides shows that corresponding compounds of elements 104-106 are more volatile. It is shown that ionic radii of elements 104-106 have also lower values as compared with their light homologs. Data obtained are explained by influence of relativistic effect on physicochemical properties of superheavy elements

[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

[en] Early gas thermochromatography experiments performed in Dubna by Zvara et al. have given evidence for a behavior of element 104 and 105 halides as expected on the basis of their position in the periodic table of elements. Recent theoretical predictions have renewed the interest in such studies and caused a need for new experiments with better statistics and higher resolution in the retention data. Using the OLGA technique (on-line gas chemistry apparatus), the volatility of element 104 and 105 bromides and chlorides were recently studied at Berkeley. In addition, for the same systems the Dubna group performed additional experiments with the thermochromatography technique. The results are summarized and confronted with recent theoretical predictions. An outlook to possible future gas chemistry experiments with element 106 is made

[en] Evaluations of the volatility of transactinide compounds are made on the basis of molecular calculations. It is shown that the volatility correlates with a set of electronic structure parameters of the molecules: overlapping population value, dipole moment and polarizability. It is inferred that volatility of element 105 and element 106 oxyhalides will be lower than that of corresponding oxyhalides of lighter analogs due to higher values of dipole moments. 7 refs., 6 figs., 1 tab

[en] This paper discusses what can be learned about the chemical properties of new elements from data on the behaviour of a few short-lived atoms and is particularly concerned with thermochromatographic studies. As an example, element 105, nielsbohrium, is considered. Some preliminary results on the comparative volatility of the higher bromides of Ns and Nb have been reported previously. Here the author proceeds with the analysis of the data. (Auth.)

No abstract available

No abstract available