![]() ![]() The Committee then joined the International Union of Pure and Applied Chemistry (IUPAC) in June 1920. ![]() This committee joined the International Association of Chemical Societies in September 1913, until it was dissolved in 1919. The international committee’s first report for 1901 was published in Chemische Berichte in 1902, and this committee continued to report annually until 1921. They published reports on best values and also issued an invitation to other chemistry organizations to appoint delegates to an international committee for atomic weights. In 1897, the German Chemical Society appointed a working committee to report on atomic weights. In 1892, the American Chemical Society appointed Clarke as a permanent one-man committee to report on a standard table of atomic weights for acceptance by the society, and he reported annually from 1893 until 1913, when he asked to be relieved of this responsibility. Clarke’s publication of his recalculation of the atomic weights in 1882. Keywords: atomic weights atomic-weight intervals cadmium conventional atomic-weight values half-life IUPAC Technical Report molybdenum selenium standard atomic weight standardization thorium uranium 1 IntroductionĬomprehensive tables of recommended atomic-weight values for use in science, industry, and commerce began with F. ![]()
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