masses of the International Union of Pure and Applied Physics (IUPAP), at its Warsaw meeting in 1963, planned and in the event did adopt “atomic mass” for
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29 avr 2013 · the IUPAC Commission on Isotopic Abundances and Atomic Weights (hereafter termed the Commission) means material from a terrestrial source
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the quantity presently defined as "atomic weight " This new definition was accepted by IUPAC and by the International Union of Pure and Applied Physics
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