The isotopic abundance and atomic weight of natural uranium

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THERE are three radioactive nuclides of uranium in nature,~(234)U,~(235)U and ~(238)U.The isotopicabundance and atomic weight of unanium was reported before.In 1983,the International U-nion of Pure and Applied Chemistry(IUPAC)gave a review of the published data.The resultsof the review showed the abundance of uraniums,~(234)U:0.000 055(5);~(235)U:0.007 200(12);~(238)U:0.992 745(60),the atomic weight of uranium,A,(U)=238.028 9(1).The THERE are three radioactive nuclides of uranium in nature, ~ (234) U, ~ (235) U and ~ (238) U.The isotopic abundance and atomic weight of unanium was reported before In 1983, the International U-nion of Pure and Applied Chemistry (IUPAC) gave a review of the published data. The results of the review showed the abundance of uraniums, ~ (234) U: 0.000 055 (5); ~ (235) U: 0.007 200 ) U: 0.992 745 (60), the atomic weight of uranium, A, (U) = 238.028 9 (1).
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