![]() ![]() Only in cases of O and Tl, where due to rounding the abridged values lie slightly outside the recommended ranges, the midpoint was taken. For those elements the weight of which is given in a certain range, e.g., '' for H, a recommended 'abridged' value was taken (1.008 for H), because if the exact source of the element is unknown, this, and not the range midpoint, is believed to correspond better to the most probable average atomic weight of these atoms in your average sample. ![]() In such cases, I took the precise value: e.g., 58.933194 for Co.
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