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Print/export Download as PDF ... move to sidebar hide. Standard atomic weight of the elements (IUPAC 2009–2021 [ref 1]) Z Symbol Name A r ... Data templates: ...
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Substantial deviations in atomic weight of the element from that given in the table can occur. r [mini-title] Range in isotopic composition of normal terrestrial material prevents a more precise standard atomic weight being given; the tabulated value and uncertainty should be applicable to normal material. Texts from CIAAW site, 19 Mar 2023.
Francis 1st flatware was produced by Reed & Barton Silversmiths. The original backstamp featured a lion, an eagle, and the letter “R”; Commonly called "Eagle-R-Lion". in about 1950 a new backstamp came into use which reads “Reed and Barton". This flatware was made in the US and is warranted by its production company for 100 years.