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Localization of the Radioactive Bromine Atom in 1-2 Dibromobutane Formed in Neutron Irradiated n. Butyl Bromide

curve towards higher nitric acid concentrations. By extrapolating this trend, a distribution curve of element 104, eka-hafnium, can be predicted. For example, similar extraction behaviour is expected for zirconium, hafnium, and element 104 in 7.5N, 8.5N, and 9.5N nitric acid solution, respectively. The experimental verification of the curve predicted for element 104 would lead to a farther confirmation of its position in the Periodic Table. We have also found that rhenium can quickly be isolated by the solvent extraction technique described here for technetium. Hence, this technique may be applied to the chemical identification of the still unknown element 107, eka-rhenium.