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幼儿童话故事Notes
- IUPAC 2009 Standard atomic weights abridged to four significant digits (Table 4 published in Pure Appl. Chem. 83, 359-396 (2011);
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doi:10.1351/PAC-REP-10-09-14). The uncertainty in the last digit of the standard atomic weight value is listed in parenthes following the value.
就业歧视In the abnce of parenthes, the uncertainty is one in that last digit. An interval in square brackets provides the lower and upper bounds of the闻官兵收河南河北
standard atomic weight for that element. No values are listed for elements which lack isotopes with a characteristic isotopic abundance in natural登楼
terrestrial samples. See PAC for more details.
- “Aluminum” and “cesium” are commonly ud alternative spellings for “aluminium” and “caesium.”
- Claims for the discovery of all the remaining elements in the last row of the Table, namely elements with atomic numbers 113, 115, 117 and 118,
and for which no assignments have yet been made, are being considered by a IUPAC and IUPAP Joint Working Party.
For updates to this table, e iupac/reports/periodic_table/. This version is dated 1 June 2012.
Copyright © 2012 IUPAC, the International Union of Pure and Applied Chemistry.
InternatIonal UnIon of
PUre and aPPlIed ChemIstry
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