The latest release of the Periodic Table (dated 4 May 2022) includes the most recent abridged standard atomic weight values released by the IUPAC Commission on Isotopic Abundances and Atomic Weights , compiled as part of the 2021 Table of Standard Atomic Weights 2021. For elements that lack isotopes with a characteristic isotopic abundance in ...

2022年5月4日 · This table includes the recently added elements 113, 115, 117, and 118 with their temporary names and symbols (see related News, released 30 Dec 2015), the standard atomic weights 2013 (abridged to four significant digits and as deduced from PAC 88, No.3 (2016) https://dx.doi.org/10.1515/pac-2015-0305), and for ytterbium, the standard atomic ...

1 H hydrogen 1.0080 ± 0.0002 1 18 3 Li lithium 6.94 ± 0.06 4 Be beryllium 9.0122 ± 0.0001 11 Na sodium 22.990 ± 0.001 12 Mg magnesium 24.305 ± 0.002 19 K potassium 39.098

2016年1月8日 · The latest release of the Periodic Table (dated 8 Jan 2016) includes the recently added elements 113, 115, 117, and 118 with their temporary names and symbols (see related News), the standard atomic weights 2013 (abridged to four significant digits and as deduced from PAC 88, No.3 (2016) https://dx.doi.org/10.1515/pac-2015-0305), and for ...

2016年6月8日 · Finally, laboratories are already working on searches for the elements in the 8th row of the periodic table, and they are also working to consolidate the identification of copernicium and heavier elements.

2022年5月17日 · IUPAC also provides an updated Periodic Table (released 4 May 2022) which contains these latest revisions listing the abridged atomic weights along with their +/− values.

2017年12月28日 · The four most recent elements (113, 115, 117 and 118) were fully added into the Periodic Table, with the approval of their names and symbols, on 28 November 2016. The International Year of the Periodic Table of the Chemical Elements will coincide with the Centenary of IUPAC ( IUPAC100 ).

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The most recent periodic table was reproduced as a tear-off page on the back cover of the printed version of the March-April 2011 issue of Chemistry International. Click here for a pdf of this version of the periodic table.

The elements in question included cerium (Ce), praseodymium (Pr), and neodymium (Nd) that are so similar that they appear to belong in the same place in the periodic table. But this would be going against a basic principle of the periodic table, namely one element, one place.