Standard Atomic Weight Values For The Mononuclides Elements 1995

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Standard Atomic Weight Values for the Mononuclides Elements, 1995

The 1993 Atomic Mass Evaluation has a major impact on the values of the atomic weights for the mononuclidic elements. Of the twenty elements, nine values changed and seven had a change in uncertainty. In addition, one of the elements, Thorium, with no stable nuclides but a characteristic terrestrial isotopic composition has a value change as a result of the new atomic mass evaluation.