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Overview: formal value types of the standard atomic weight[1]
Element (E)
​ 		Ar°(E)
 Value type
​ 		Ar°(E), abridged
or conventional 		Mass number
[most stable isotope]
hydrogen 1H [1.00784, 1.00811] interval 1.0080±0.0002
nitrogen 7N [14.00643, 14.00728] interval 14.007±0.001
fluorine 9F 18.998403162±0.000000005 number ± uncertainty 18.998±0.001
calcium 20Ca 40.078±0.004 number ± uncertainty 40.078±0.004
technetium 43Tc (none) most stable isotope [97]

Usage

[edit]

Use parameter |format=:

{{Infobox element/symbol-to-saw|format=...}}
  • |format=standard (default)
  • |format=abridged
  • |format=formal-short-rounded
  • |format=year-changed
  • |format=value-type
  • |format=gmr-footnote
  • |format=source
For 'most stable isotope' value (Tc, Rf, Uue etc.), see also {{Infobox element/symbol-to-most-stable-isotope}}.
|valformat=

sourcing

[edit]
{{Infobox element/symbol-to-saw/CIAAW-saw-element-page|Hg|format=source}} →
"Standard Atomic Weights: Mercury". CIAAW. 2011.
or as |format=ref[2]

g, m, r footnote

[edit]
|format=gmr-footnote
|symbol=H, Og, g-text, m-text, r-text
|valformat=letter, footnote-text (dev Mar2023)
g [mini-title] Geological and biological materials are known in which the element has an isotopic composition outside the limits for normal material. The difference between the atomic weight of the element in such materials and that given in the table may exceed the stated uncertainty.
m [mini-title] Modified isotopic compositions may be found in commercially available material because the material has been subjected to some undisclosed or inadvertent isotopic fractionation. 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.
(developing, Mar 2023)
enwiki prefix (mini-title)
g
not applicable for exceptional natural samples
m
not applicable for exceptional man-made samples (undisclosed enrichment)
r
natural variation too large to give single value

(from [1] -DePiep (talk) 09:48, 26 March 2023 (UTC))

Overview

[edit]
See also: Overview, and compare with wikidata
Standard atomic weights of the elements overview page (data)
Z Symbol Name Ar°(E)
2021: Table 1, columns 4, 5 		Type
  		Abridged
columns 7, 8 		g, m, r m.s.i. Year changed

1 H hydrogen [1.00784, 1.00811] 2 1.0080±0.0002 m 2009[3]
2 He helium 4.002602±0.000002 1 4.0026±0.0001 g, r 1983[4]
3 Li lithium [6.938, 6.997] 2 6.94±0.06 m 2009[5]
4 Be beryllium 9.0121831±0.0000005 1 9.0122±0.0001 2013[6]
5 B boron [10.806, 10.821] 2 10.81±0.02 m 2009[7]
6 C carbon [12.0096, 12.0116] 2 12.011±0.002 2009[8]
7 N nitrogen [14.00643, 14.00728] 2 14.007±0.001 m 2009[9]
8 O oxygen [15.99903, 15.99977] 2 15.999±0.001 m 2009[10]
9 F fluorine 18.998403162±0.000000005 1 18.998±0.001 2021[11]
10 Ne neon 20.1797±0.0006 1 20.180±0.001 g, m 1985[12]
11 Na sodium 22.98976928±0.00000002 1 22.990±0.001 2005[13]
12 Mg magnesium [24.304, 24.307] 2 24.305±0.002 2011[14]
13 Al aluminium 26.9815384±0.0000003 1 26.982±0.001 2017[15]
14 Si silicon [28.084, 28.086] 2 28.085±0.001 2009[16]
15 P phosphorus 30.973761998±0.000000005 1 30.974±0.001 2013[17]
16 S sulfur [32.059, 32.076] 2 32.06±0.02 2009[18]
17 Cl chlorine [35.446, 35.457] 2 35.45±0.01 m 2009[19]
18 Ar argon [39.792, 39.963] 2 39.95±0.16 2017[20]
19 K potassium 39.0983±0.0001 1 39.098±0.001 1979[21]
20 Ca calcium 40.078±0.004 1 40.078±0.004 g 1983[22]
21 Sc scandium 44.955907±0.000004 1 44.956±0.001 2021[23]
22 Ti titanium 47.867±0.001 1 47.867±0.001 1993[24]
23 V vanadium 50.9415±0.0001 1 50.942±0.001 1977[25]
24 Cr chromium 51.9961±0.0006 1 51.996±0.001 1983[26]
25 Mn manganese 54.938043±0.000002 1 54.938±0.001 2017[27]
26 Fe iron 55.845±0.002 1 55.845±0.002 1993[28]
27 Co cobalt 58.933194±0.000003 1 58.933±0.001 2017[29]
28 Ni nickel 58.6934±0.0004 1 58.693±0.001 r 2007[30]
29 Cu copper 63.546±0.003 1 63.546±0.003 r 1969[31]
30 Zn zinc 65.38±0.02 1 65.38±0.02 r 2007[32]
31 Ga gallium 69.723±0.001 1 69.723±0.001 1987[33]
32 Ge germanium 72.630±0.008 1 72.630±0.008 2009[34]
33 As arsenic 74.921595±0.000006 1 74.922±0.001 2013[35]
34 Se selenium 78.971±0.008 1 78.971±0.008 r 2013[36]
35 Br bromine [79.901, 79.907] 2 79.904±0.003 2011[37]
36 Kr krypton 83.798±0.002 1 83.798±0.002 g, m 2001[38]
37 Rb rubidium 85.4678±0.0003 1 85.468±0.001 g 1969[39]
38 Sr strontium 87.62±0.01 1 87.62±0.01 g, r 1969[40]
39 Y yttrium 88.905838±0.000002 1 88.906±0.001 2021[41]
40 Zr zirconium 91.222±0.003 1 91.222±0.003 g 2024[42]
41 Nb niobium 92.90637±0.00001 1 92.906±0.001 2017[43]
42 Mo molybdenum 95.95±0.01 1 95.95±0.01 g 2013[44]
43 Tc technetium - 3 [97]
44 Ru ruthenium 101.07±0.02 1 101.07±0.02 g 1983[45]
45 Rh rhodium 102.90549±0.00002 1 102.91±0.01 2017[46]
46 Pd palladium 106.42±0.01 1 106.42±0.01 g 1979[47]
47 Ag silver 107.8682±0.0002 1 107.87±0.01 g 1985[48]
48 Cd cadmium 112.414±0.004 1 112.41±0.01 g 2013[49]
49 In indium 114.818±0.001 1 114.82±0.01 2011[50]
50 Sn tin 118.710±0.007 1 118.71±0.01 g 1983[51]
51 Sb antimony 121.760±0.001 1 121.76±0.01 g 1993[52]
52 Te tellurium 127.60±0.03 1 127.60±0.03 g 1969[53]
53 I iodine 126.90447±0.00003 1 126.90±0.01 1985[54]
54 Xe xenon 131.293±0.006 1 131.29±0.01 g, m 1999[55]
55 Cs caesium 132.90545196±0.00000006 1 132.91±0.01 2013[56]
56 Ba barium 137.327±0.007 1 137.33±0.01 1985[57]
57 La lanthanum 138.90547±0.00007 1 138.91±0.01 g 2005[58]
58 Ce cerium 140.116±0.001 1 140.12±0.01 g 1995[59]
59 Pr praseodymium 140.90766±0.00001 1 140.91±0.01 2017[60]
60 Nd neodymium 144.242±0.003 1 144.24±0.01 g 2005[61]
61 Pm promethium 3 [145]
62 Sm samarium 150.36±0.02 1 150.36±0.02 g 2005[62]
63 Eu europium 151.964±0.001 1 151.96±0.01 g 1995[63]
64 Gd gadolinium 157.249±0.002 1 157.25±0.01 g 2024[64]
65 Tb terbium 158.925354±0.000007 1 158.93±0.01 2021[65]
66 Dy dysprosium 162.500±0.001 1 162.50±0.01 g 2001[66]
67 Ho holmium 164.930329±0.000005 1 164.93±0.01 2021[67]
68 Er erbium 167.259±0.003 1 167.26±0.01 g 1999[68]
69 Tm thulium 168.934219±0.000005 1 168.93±0.01 2021[69]
70 Yb ytterbium 173.045±0.010 1 173.05±0.02 g 2015[70]
71 Lu lutetium 174.96669±0.00005 1 174.97±0.01 g 2024[71]
72 Hf hafnium 178.486±0.006 1 178.49±0.01 g 2019[72]
73 Ta tantalum 180.94788±0.00002 1 180.95±0.01 2005[73]
74 W tungsten 183.84±0.01 1 183.84±0.01 1991[74]
75 Re rhenium 186.207±0.001 1 186.21±0.01 1973[75]
76 Os osmium 190.23±0.03 1 190.23±0.03 g 1991[76]
77 Ir iridium 192.217±0.002 1 192.22±0.01 2017[77]
78 Pt platinum 195.084±0.009 1 195.08±0.02 2005[78]
79 Au gold 196.966570±0.000004 1 196.97±0.01 2017[79]
80 Hg mercury 200.592±0.003 1 200.59±0.01 2011[80]
81 Tl thallium [204.382, 204.385] 2 204.38±0.01 2009[81]
82 Pb lead [206.14, 207.94] 2 207.2±1.1 2020[82]
83 Bi bismuth 208.98040±0.00001 1 208.98±0.01 2005[83]
84 Po polonium - 3 [209]
85 At astatine - 3 [210]
86 Rn radon - 3 [222]
87 Fr francium - 3 [223]
88 Ra radium - 3 [226]
89 Ac actinium - 3 [227]
90 Th thorium 232.0377±0.0004 1 232.04±0.01 g 2013[84]
91 Pa protactinium 231.03588±0.00001 1 231.04±0.01 2017[85]
92 U uranium 238.02891±0.00003 1 238.03±0.01 g, m 1999[86]
93 Np neptunium - 3 [237]
94 Pu plutonium - 3 [244]
95 Am americium - 3 [243]
96 Cm curium - 3 [247]
97 Bk berkelium - 3 [247]
98 Cf californium - 3 [251]
99 Es einsteinium - 3 [252]
100 Fm fermium - 3 [257]
101 Md mendelevium - 3 [258]
102 No nobelium - 3 [259]
103 Lr lawrencium - 3 [266]
104 Rf rutherfordium - 3 [267]
105 Db dubnium - 3 [268]
106 Sg seaborgium - 3 [267]
107 Bh bohrium - 3 [270]
108 Hs hassium - 3 [271]
109 Mt meitnerium - 3 [278]
110 Ds darmstadtium - 3 [281]
111 Rg roentgenium - 3 [282]
112 Cn copernicium - 3 [285]
113 Nh nihonium - 3 [286]
114 Fl flerovium - 3 [289]
115 Mc moscovium - 3 [290]
116 Lv livermorium - 3 [293]
117 Ts tennessine - 3 [294]
118 Og oganesson - 3 [294]
119 Uue ununennium -
120 Ubn unbinilium -
121 Ubu unbiunium -
122 Ubb unbibium -
124 Ubq unbiquadium -
126 Ubh unbihexium -
g Geological and biological materials are known in which the element has an isotopic composition outside the limits for normal material. The difference between the atomic weight of the element in such materials and that given in the table may exceed the stated uncertainty.
m Modified isotopic compositions may be found in commercially available material because the material has been subjected to some undisclosed or inadvertent isotopic fractionation. Substantial deviations in atomic weight of the element from that given in the table can occur.
r 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.

References

[edit]
  1. ^ Prohaska, Thomas; Irrgeher, Johanna; Benefield, Jacqueline; Böhlke, John K.; Chesson, Lesley A.; Coplen, Tyler B.; Ding, Tiping; Dunn, Philip J. H.; Gröning, Manfred; Holden, Norman E.; Meijer, Harro A. J. (2022-05-04). "Standard atomic weights of the elements 2021 (IUPAC Technical Report)". Pure and Applied Chemistry. doi:10.1515/pac-2019-0603. ISSN 1365-3075.
  2. ^ "Standard Atomic Weights: Mercury". CIAAW. 2011.
  3. ^ "Standard Atomic Weights: Hydrogen". CIAAW. 2009.
  4. ^ "Standard Atomic Weights: Helium". CIAAW. 1983.
  5. ^ "Standard Atomic Weights: Lithium". CIAAW. 2009.
  6. ^ "Standard Atomic Weights: Beryllium". CIAAW. 2013.
  7. ^ "Standard Atomic Weights: Boron". CIAAW. 2009.
  8. ^ "Standard Atomic Weights: Carbon". CIAAW. 2009.
  9. ^ "Standard Atomic Weights: Nitrogen". CIAAW. 2009.
  10. ^ "Standard Atomic Weights: Oxygen". CIAAW. 2009.
  11. ^ "Standard Atomic Weights: Fluorine". CIAAW. 2021.
  12. ^ "Standard Atomic Weights: Neon". CIAAW. 1985.
  13. ^ "Standard Atomic Weights: Sodium". CIAAW. 2005.
  14. ^ "Standard Atomic Weights: Magnesium". CIAAW. 2011.
  15. ^ "Standard Atomic Weights: Aluminium". CIAAW. 2017.
  16. ^ "Standard Atomic Weights: Silicon". CIAAW. 2009.
  17. ^ "Standard Atomic Weights: Phosphorus". CIAAW. 2013.
  18. ^ "Standard Atomic Weights: Sulfur". CIAAW. 2009.
  19. ^ "Standard Atomic Weights: Chlorine". CIAAW. 2009.
  20. ^ "Standard Atomic Weights: Argon". CIAAW. 2017.
  21. ^ "Standard Atomic Weights: Potassium". CIAAW. 1979.
  22. ^ "Standard Atomic Weights: Calcium". CIAAW. 1983.
  23. ^ "Standard Atomic Weights: Scandium". CIAAW. 2021.
  24. ^ "Standard Atomic Weights: Titanium". CIAAW. 1993.
  25. ^ "Standard Atomic Weights: Vanadium". CIAAW. 1977.
  26. ^ "Standard Atomic Weights: Chromium". CIAAW. 1983.
  27. ^ "Standard Atomic Weights: Manganese". CIAAW. 2017.
  28. ^ "Standard Atomic Weights: Iron". CIAAW. 1993.
  29. ^ "Standard Atomic Weights: Cobalt". CIAAW. 2017.
  30. ^ "Standard Atomic Weights: Nickel". CIAAW. 2007.
  31. ^ "Standard Atomic Weights: Copper". CIAAW. 1969.
  32. ^ "Standard Atomic Weights: Zinc". CIAAW. 2007.
  33. ^ "Standard Atomic Weights: Gallium". CIAAW. 1987.
  34. ^ "Standard Atomic Weights: Germanium". CIAAW. 2009.
  35. ^ "Standard Atomic Weights: Arsenic". CIAAW. 2013.
  36. ^ "Standard Atomic Weights: Selenium". CIAAW. 2013.
  37. ^ "Standard Atomic Weights: Bromine". CIAAW. 2011.
  38. ^ "Standard Atomic Weights: Krypton". CIAAW. 2001.
  39. ^ "Standard Atomic Weights: Rubidium". CIAAW. 1969.
  40. ^ "Standard Atomic Weights: Strontium". CIAAW. 1969.
  41. ^ "Standard Atomic Weights: Yttrium". CIAAW. 2021.
  42. ^ "Standard Atomic Weights: Zirconium". CIAAW. 2024.
  43. ^ "Standard Atomic Weights: Niobium". CIAAW. 2017.
  44. ^ "Standard Atomic Weights: Molybdenum". CIAAW. 2013.
  45. ^ "Standard Atomic Weights: Ruthenium". CIAAW. 1983.
  46. ^ "Standard Atomic Weights: Rhodium". CIAAW. 2017.
  47. ^ "Standard Atomic Weights: Palladium". CIAAW. 1979.
  48. ^ "Standard Atomic Weights: Silver". CIAAW. 1985.
  49. ^ "Standard Atomic Weights: Cadmium". CIAAW. 2013.
  50. ^ "Standard Atomic Weights: Indium". CIAAW. 2011.
  51. ^ "Standard Atomic Weights: Tin". CIAAW. 1983.
  52. ^ "Standard Atomic Weights: Antimony". CIAAW. 1993.
  53. ^ "Standard Atomic Weights: Tellurium". CIAAW. 1969.
  54. ^ "Standard Atomic Weights: Iodine". CIAAW. 1985.
  55. ^ "Standard Atomic Weights: Xenon". CIAAW. 1999.
  56. ^ "Standard Atomic Weights: Caesium". CIAAW. 2013.
  57. ^ "Standard Atomic Weights: Barium". CIAAW. 1985.
  58. ^ "Standard Atomic Weights: Lanthanum". CIAAW. 2005.
  59. ^ "Standard Atomic Weights: Cerium". CIAAW. 1995.
  60. ^ "Standard Atomic Weights: Praseodymium". CIAAW. 2017.
  61. ^ "Standard Atomic Weights: Neodymium". CIAAW. 2005.
  62. ^ "Standard Atomic Weights: Samarium". CIAAW. 2005.
  63. ^ "Standard Atomic Weights: Europium". CIAAW. 1995.
  64. ^ "Standard Atomic Weights: Gadolinium". CIAAW. 2024.
  65. ^ "Standard Atomic Weights: Terbium". CIAAW. 2021.
  66. ^ "Standard Atomic Weights: Dysprosium". CIAAW. 2001.
  67. ^ "Standard Atomic Weights: Holmium". CIAAW. 2021.
  68. ^ "Standard Atomic Weights: Erbium". CIAAW. 1999.
  69. ^ "Standard Atomic Weights: Thulium". CIAAW. 2021.
  70. ^ "Standard Atomic Weights: Ytterbium". CIAAW. 2015.
  71. ^ "Standard Atomic Weights: Lutetium". CIAAW. 2024.
  72. ^ "Standard Atomic Weights: Hafnium". CIAAW. 2019.
  73. ^ "Standard Atomic Weights: Tantalum". CIAAW. 2005.
  74. ^ "Standard Atomic Weights: Tungsten". CIAAW. 1991.
  75. ^ "Standard Atomic Weights: Rhenium". CIAAW. 1973.
  76. ^ "Standard Atomic Weights: Osmium". CIAAW. 1991.
  77. ^ "Standard Atomic Weights: Iridium". CIAAW. 2017.
  78. ^ "Standard Atomic Weights: Platinum". CIAAW. 2005.
  79. ^ "Standard Atomic Weights: Gold". CIAAW. 2017.
  80. ^ "Standard Atomic Weights: Mercury". CIAAW. 2011.
  81. ^ "Standard Atomic Weights: Thallium". CIAAW. 2009.
  82. ^ "Standard Atomic Weights: Lead". CIAAW. 2020.
  83. ^ "Standard Atomic Weights: Bismuth". CIAAW. 2005.
  84. ^ "Standard Atomic Weights: Thorium". CIAAW. 2013.
  85. ^ "Standard Atomic Weights: Protactinium". CIAAW. 2017.
  86. ^ "Standard Atomic Weights: Uranium". CIAAW. 1999.


Updates

[edit]
  (This list:
)

CIAAW may publish changes to atomic weights (including its precision and derived values). Since 1947, any update this is done in odd years nominally; the actual date of publication may be some time later.

  • 2009 {{CIAAW2009}} (introducing interval notation; Ge):
"Atomic weights of the elements 2009 (IUPAC Technical Report)". Pure Appl. Chem. 83 (2): 359–396. 12 December 2010. doi:10.1351/PAC-REP-10-09-14.
"Atomic weights of the elements 2011 (IUPAC Technical Report)". Pure Appl. Chem. 85 (5): 1047–1078. 29 April 2013. doi:10.1351/PAC-REP-13-03-02.
Meija, Juris; et al. (2016). "Atomic weights of the elements 2013 (IUPAC Technical Report)". Pure and Applied Chemistry. 88 (3): 265–91. doi:10.1515/pac-2015-0305.
"Standard Atomic Weight of Ytterbium Revised". Chemistry International. 37 (5–6): 26. October 2015. doi:10.1515/ci-2015-0512. eISSN 0193-6484. ISSN 0193-6484.
"Standard atomic weights of 14 chemical elements revised". CIAAW. 2018-06-05.
* "2020" is an inconsistent year for change publication: CIAAW maintains that only odd years, changes are publicised.
  • 2021 {{CIAAW2021}} (all elements listed); (4 values changed; introduced new symbol; merge "conventional" into "abridged" columns; change uncertainty notation (use "±")
Prohaska, Thomas; Irrgeher, Johanna; Benefield, Jacqueline; Böhlke, John K.; Chesson, Lesley A.; Coplen, Tyler B.; Ding, Tiping; Dunn, Philip J. H.; Gröning, Manfred; Holden, Norman E.; Meijer, Harro A. J. (2022-05-04). "Standard atomic weights of the elements 2021 (IUPAC Technical Report)". Pure and Applied Chemistry. doi:10.1515/pac-2019-0603. ISSN 1365-3075.
Uncertainty handling

About notation and handling of the uncertainty in the values, including those in [ ] range values:

Outdated references
See also: {{Isotopes table/references}}

Data templates to update

[edit]
data
{{CIAAW2021}}
secondary data

See also

[edit]


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