Chemical Properties of Element 105 in Aqueous Solution: Halide Complex Formation and Anion Exchange into Triisoctyl Amine

Studies of the halide complexation of element 105 in aqueous solution were performed on 34-s 262Ha produced in the 249Bk(18-O,5n) reaction. The 262Ha was detected by measuring the fission and alpha activities associated with its decay and the alpha decays of its daughter, 4.3-s 258Lr. Time-correlated pairs of parent and daughter alpha particles provided a unique identification of the presence of 262Ha. About 1600 anion exchange separations of 262Ha from HCl and mixed HC1/HF solutions were performed on a one-minute time scale. Reversed-phase micro-chromatographic columns incorporating triisooctyl amine (TIOA) on an inert support were used in the computer-controlled liquid chromatography apparatus, ARCA II. 262Ha was shown to be adsorbed on the column from either 12 M HCl/0.02 M HF or 10 M HCl solutions like its homologs Nb and Ta, and like Pa. In elutions with 4 M HCl/0.02 M HF (Pa-Nb fraction), and with 6 M HNO3/O.OI5 M HF (Ta fraction), the 262Ha activity was found in the Pa-Nb fraction showing that the anionic halide complexes are different from those of Ta, and are more like those of Nb and Pa. In separate elutions with 10 M HCl/0.025 M HF (Pa fraction) and 6 M HN03/0.015 M HF (stripping of Nb) the 262Ha was found to be equally divided between the Pa and Nb fractions. The non-tantalum like halide complexation of Ha is indicative of the formation of oxohalide or hydroxohalide complexes, like [NbOCU]" and [PaOCl4] or [Pa(OH)2Cl4]", at least for intermediate HCl concentrations, in contrast to the pure halide complexes in Ta, like [TaCl6]-

Discovery of the Isotopes with 11 <= Z <= 19

A total of 194 isotopes with 11 $\le$ Z $\le$ 19 have been identified to date. The discovery of these isotopes which includes the observation of unbound nuclei, is discussed. For each isotope a brief summary of the first refereed publication, including the production and identification method, is presented.Comment: to be pubslihed in At. Data Nucl. Data Table

الكلمات الملايوية ذات أصل عربي في قاموس دايا والاستيفادة منها في تعليم اللغة العبية للملايويين المبتدئين في حرف إي نموذجا

Arabic had entered Indonesian because of Islam which was brought by the Arab traders around the 7th century. The inclusion of Islam in the midst of the society had a considerable influence, especially among the malays people who are Muslim majority. In this study, the researcher tryed to explore 50 Malay words which are borrowed from Arabic in “Daya” dictionary, from letter A, and followed&nbsp; by an analysis of the meanings and changes in the pronunciation of each word, and the method used in this study has an analitycal descriptive approach that proved that there were some many loan words in Malay that are similar to Arabic, but in some words there were changes in the way of pronunciaton, and there has expansion of the meaning, the narrowing of the meaning or complete change in the meaning. This research also proved that these loan words have a considerable role to facilitate the process of&nbsp; learning Arabic for Malay students such as the introduction of Malay words derived from Arabic, and they use these words in the conversation, reading text, evaluation, and make it a tool to explain the meaning of Arabic that students have not understood