Difference between revisions of "Data:Atomic weights of the elements 2007"
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| + | The following is the 2007 IUPAC list of standard [[atomic weight]]s approved by the Commission on Isotopic Abundances and Atomic Weights (CIAAW) and published in ''[[Pure and Applied Chemistry]]''.<ref>{{IUPAC atomic weights 2007}}.</ref> Elements with no stable isotopes ([[Tecnetium|Tc]], [[Promethium|Pm]], [[Polonium|Po]]–) have been omitted, except for [[thorium]], [[protactinium]] and [[uranium]] which have a charcteristic terrestrial isotopic composition. | ||
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41 niobium Nb 92.906 38(2) | 41 niobium Nb 92.906 38(2) | ||
42 molybdenum Mo 95.96(2) g r | 42 molybdenum Mo 95.96(2) g r | ||
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44 ruthenium Ru 101.07(2) g | 44 ruthenium Ru 101.07(2) g | ||
45 rhodium Rh 102.905 50(2) | 45 rhodium Rh 102.905 50(2) | ||
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59 praseodymium Pr 140.907 65(2) | 59 praseodymium Pr 140.907 65(2) | ||
60 neodymium Nd 144.242(3) g | 60 neodymium Nd 144.242(3) g | ||
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62 samarium Sm 150.36(2) g | 62 samarium Sm 150.36(2) g | ||
63 europium Eu 151.964(1) g | 63 europium Eu 151.964(1) g | ||
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82 lead Pb 207.2(1) g r | 82 lead Pb 207.2(1) g r | ||
83 bismuth Bi 208.980 40(1) | 83 bismuth Bi 208.980 40(1) | ||
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90 thorium* Th 232.038 06(2) g | 90 thorium* Th 232.038 06(2) g | ||
91 protactinium* Pa 231.035 88(2) | 91 protactinium* Pa 231.035 88(2) | ||
92 uranium* U 238.028 91(3) g m | 92 uranium* U 238.028 91(3) g m | ||
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| + | ==Footnotes to table== | ||
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==References== | ==References== | ||
{{reflist}} | {{reflist}} | ||
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==External links== | ==External links== | ||
{{wikipedia|List of elements by atomic weight}} | {{wikipedia|List of elements by atomic weight}} | ||
| + | *[http://www.ciaaw.org IUPAC Commission on Isotopic Abundances and Atomic Weights] | ||
| + | *[http://physics.nist.gov/cgi-bin/Compositions/stand_alone.pl?ele=&ascii=html&isotype=some NIST relative atomic masses of all isotopes and the standard atomic weights of the elements] | ||
[[Category:Atomic weight|λ]] | [[Category:Atomic weight|λ]] | ||
{{CC-BY-3.0}} | {{CC-BY-3.0}} | ||
Revision as of 16:35, 20 March 2010
The following is the 2007 IUPAC list of standard atomic weights approved by the Commission on Isotopic Abundances and Atomic Weights (CIAAW) and published in Pure and Applied Chemistry.[1] Elements with no stable isotopes (Tc, Pm, Po–) have been omitted, except for thorium, protactinium and uranium which have a charcteristic terrestrial isotopic composition.
| Z | Name | Symbol | Atomic weight | Footnotes |
|---|---|---|---|---|
| 1 | hydrogen | H | 1.007 94(7) | g m r |
| 2 | helium | He | 4.002 602(2) | g r |
| 3 | lithium | Li | [6.941(2)]† | g m r |
| 4 | beryllium | Be | 9.012 182(3) | |
| 5 | boron | B | 10.811(7) | g m r |
| 6 | carbon | C | 12.0107(8) | g r |
| 7 | nitrogen | N | 14.0067(2) | g r |
| 8 | oxygen | O | 15.9994(3) | g r |
| 9 | fluorine | F | 18.998 4032(5) | |
| 10 | neon | Ne | 20.1797(6) | g m |
| 11 | sodium | Na | 22.989 769 28(2) | |
| 12 | magnesium | Mg | 24.3050(6) | |
| 13 | aluminium | Al | 26.981 5386(8) | |
| 14 | silicon | Si | 28.0855(3) | r |
| 15 | phosphorus | P | 30.973 762(2) | |
| 16 | sulfur | S | 32.065(5) | g r |
| 17 | chlorine | Cl | 35.453(2) | g m r |
| 18 | argon | Ar | 39.948(1) | g r |
| 19 | potassium | K | 39.0983(1) |
Footnotes to table
References
- ↑ Atomic Weights of the Elements 2007. Pure Appl. Chem. 2009, 81 (11), 2131–56. DOI: 10.1351/PAC-REP-09-08-03.
External links
 |
See also the corresponding article on Wikipedia. |
- IUPAC Commission on Isotopic Abundances and Atomic Weights
- NIST relative atomic masses of all isotopes and the standard atomic weights of the elements
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