Comission on Isotopic Abundances and Atomic Weights 2012
International Union of Pure and Applied Chemistry
http://www.ciaaw.org/atomic-masses.htm


1   H   hydrogen    1     1.007 825 0322(6)
2     2.014 101 7781(8)
2   He  helium  3     3.016 029 32(2)
4     4.002 603 2541(4)
3   Li  lithium     6     6.015 122 887(9)
7     7.016 003 44(3)
4   Be  beryllium   9     9.012 1831(5)
5   B   boron   10   10.012 937(3)
11   11.009 305(3)
6   C   carbon  12   12(exactly)
13   13.003 354 835(2)
7   N   nitrogen    14   14.003 074 004(2)
15   15.000 108 899(4)
8   O   oxygen  16   15.994 914 620(2)
17   16.999 131 757(5)
18   17.999 159 613(6)
9   F   fluorine    19   18.998 403 163(6)
10  Ne  neon    20   19.992 440 18(2)
21   20.993 8467(3)
22   21.991 3851(2)
11  Na  sodium  23   22.989 769 28(2)
12  Mg  magnesium   24   23.985 041 70(9)
25   24.985 8370(3)
26   25.982 5930(2)
13  Al  aluminium   27   26.981 5385(7)
14  Si  silicon     28   27.976 926 535(3)
29   28.976 494 665(3)
30   29.973 770 01(2)
15  P   phosphorous     31   30.973 761 998(5)
16  S   sulfur  32   31.972 071 174(9)
33   32.971 458 910(9)
34   33.967 8670(3)
36   35.967 081(2)
17  Cl  chlorine    35   34.968 8527(3)
37   36.965 9026(4)
18  Ar  argon   36   35.967 5451(2)
38   37.962 732(2)
40   39.962 383 12(2)
19  K   potassium   39   38.963 706 49(3)
40*      39.963 9982(4)
41   40.961 825 26(3)
20  Ca  calcium     40   39.962 5909(2)
42   41.958 618(1)
43   42.958 766(2)
44   43.955 482(2)
46   45.953 69(2)
48*      47.952 5228(8)
21  Sc  scandium    45   44.955 908(5)
22  Ti  titanium    46   45.952 628(3)
47   46.951 759(3)
48   47.947 942(3)
49   48.947 866(3)
50   49.944 787(3)
23  V   vanadium    50*      49.947 156(6)
51   50.943 957(6)
24  Cr  chromium    50   49.946 042(6)
52   51.940 506(4)
53   52.940 648(4)
54   53.938 879(4)
25  Mn  manganese   55   54.938 044(3)
26  Fe  iron    54   53.939 609(3)
56   55.934 936(3)
57   56.935 393(3)
58   57.933 274(3)
27  Co  cobalt  59   58.933 194(4)
28  Ni  nickel  58   57.935 342(3)
60   59.930 786(3)
61   60.931 056(3)
62   61.928 345(4)
64   63.927 967(4)
29  Cu  copper  63   62.929 598(4)
65   64.927 790(5)
30  Zn  zinc    64   63.929 142(5)
66   65.926 034(6)
67   66.927 128(6)
68   67.924 845(6)
70   69.925 32(2)
31  Ga  gallium     69   68.925 574(8)
71   70.924 703(6)
32  Ge  germanium   70   69.924 249(6)
72   71.922 0758(5)
73   72.923 4590(4)
74   73.921 177 76(9)
76*      75.921 4027(2)
33  As  arsenic     75   74.921 595(6)
34  Se  selenium    74   73.922 4759(1)
76   75.919 2137(2)
77   76.919 9142(5)
78   77.917 309(2)
80   79.916 522(8)
82*      81.916 700(9)
35  Br  bromine     79   78.918 338(9)
81   80.916 290(9)
36  Kr  krypton     78*      77.920 365(5)
80   79.916 378(5)
82   81.913 483(6)
83   82.914 127(2)
84   83.911 497 73(3)
86   85.910 610 63(3)
37  Rb  rubidium    85   84.911 789 74(3)
87*      86.909 180 53(5)
38  Sr  strontium   84   83.913 419(8)
86   85.909 261(8)
87   86.908 878(8)
88   87.905 613(8)
39  Y   yttrium     89   88.905 84(2)
40  Zr  zirconium   90   89.904 70(2)
91   90.905 64(2)
92   91.905 03(2)
94   93.906 31(2)
96*      95.908 27(2)
41  Nb  niobium     93   92.906 37(2)
42  Mo  molybdenum  92   91.906 808(5)
94   93.905 085(3)
95   94.905 839(3)
96   95.904 676(3)
97   96.906 018(3)
98   97.905 405(3)
100*     99.907 472(7)
43  Tc  technetium  98*      97.907 21(3)
44  Ru  ruthenium   96   95.907 590(3)
98   97.905 29(5)
99   98.905 934(7)
100      99.904 214(7)
101     100.905 577(8)
102     101.904 344(8)
104     103.905 43(2)
45  Rh  rhodium     103     102.905 50(2)
46  Pd  palladium   102     101.905 60(2)
104     103.904 031(9)
105     104.905 080(8)
106     105.903 480(8)
108     107.903 892(8)
110     109.905 172(5)
47  Ag  silver  107     106.905 09(2)
109     108.904 755(9)
48  Cd  cadmium     106     105.906 460(8)
108     107.904 183(8)
110     109.903 007(4)
111     110.904 183(4)
112     111.902 763(4)
113*    112.904 408(3)
114     113.903 365(3)
116*    115.904 763(2)
49  In  indium  113     112.904 062(6)
115*    114.903 878 78(8)
50  Sn  tin     112     111.904 824(4)
114     113.902 783(6)
115     114.903 3447(1)
116     115.901 743(1)
117     116.902 954(3)
118     117.901 607(3)
119     118.903 311(5)
120     119.902 202(6)
122     121.903 44(2)
124     123.905 277(7)
51  Sb  antimony    121     120.903 81(2)
123     122.904 21(2)
52  Te  tellurium   120     119.904 06(2)
122     121.903 04(1)
123     122.904 27(1)
124     123.902 82(1)
125     124.904 43(1)
126     125.903 31(1)
128*    127.904 461(6)
130*    129.906 222 75(8)
53  I   iodine  127     126.904 47(3)
54  Xe  xenon   124     123.905 89(2)
126     125.904 30(3)
128     127.903 531(7)
129     128.904 780 86(4)
130     129.903 5094(1)
131     130.905 084(2)
132     131.904 155 09(4)
134     133.905 395(6)
136*    135.907 214 48(7)
55  Cs  caesium     133     132.905 451 96(6)
56  Ba  barium  130*    129.906 32(2)
132     131.905 061(7)
134     133.904 508(2)
135     134.905 688(2)
136     135.904 576(2)
137     136.905 827(2)
138     137.905 247(2)
57  La  lanthanum   138*    137.907 12(3)
139     138.906 36(2)
58  Ce  cerium  136     135.907 129(3)
138     137.905 99(7)
140     139.905 44(2)
142     141.909 25(2)
59  Pr  praseodymium    141     140.907 66(2)
60  Nd  neodymium   142     141.907 73(2)
143     142.909 82(2)
144*    143.910 09(2)
145     144.912 58(2)
146     145.913 12(2)
148     147.916 90(2)
150*    149.920 90(2)
61  Pm  promethium  145*    144.912 76(2)
62  Sm  samarium    144     143.912 01(2)
147*    146.914 90(2)
148*    147.914 83(2)
149     148.917 19(2)
150     149.917 28(2)
152     151.919 74(2)
154     153.922 22(2)
63  Eu  europium    151*    150.919 86(2)
153     152.921 24(2)
64  Gd  gadolinium  152     151.919 80(2)
154     153.920 87(2)
155     154.922 63(2)
156     155.922 13(2)
157     156.923 97(2)
158     157.924 11(2)
160     159.927 06(2)
65  Tb  terbium     159     158.925 35(2)
66  Dy  dysprosium  156     155.924 28(2)
158     157.924 42(2)
160     159.925 20(2)
161     160.926 94(2)
162     161.926 81(2)
163     162.928 74(2)
164     163.929 18(2)
67  Ho  holmium     165     164.930 33(2)
68  Er  erbium  162     161.928 79(2)
164     163.929 21(2)
166     165.930 30(2)
167     166.932 05(2)
168     167.932 38(2)
170     169.935 47(2)
69  Tm  thulium     169     168.934 22(2)
70  Yb  ytterbium   168     167.933 89(2)
170     169.934 77(2)
171     170.936 33(2)
172     171.936 39(2)
173     172.938 22(2)
174     173.938 87(2)
176     175.942 58(2)
71  Lu  lutetium    175     174.940 78(2)
176*    175.942 69(2)
72  Hf  hafnium     174*    173.940 05(2)
176     175.941 41(2)
177     176.943 23(2)
178     177.943 71(2)
179     178.945 82(2)
180     179.946 56(2)
73  Ta  tantalum    180*    179.947 46(2)
181     180.948 00(2)
74  W   tungsten    180*    179.946 71(2)
182     181.948 204(6)
183     182.950 223(6)
184     183.950 931(6)
186     185.954 36(2)
75  Re  rhenium     185     184.952 955(8)
187*    186.955 75(1)
76  Os  osmium  184*    183.952 489(9)
186*    185.953 84(1)
187     186.955 75(1)
188     187.955 84(1)
189     188.958 14(2)
190     189.958 44(2)
192     191.961 48(2)
77  Ir  iridium     191     190.960 59(2)
193     192.962 92(2)
78  Pt  platinum    190*    189.959 93(4)
192     191.961 04(2)
194     193.962 681(6)
195     194.964 792(6)
196     195.964 952(6)
198     197.967 89(2)
79  Au  gold    197     196.966 569(5)
80  Hg  mercury     196     195.965 83(2)
198     197.966 769(3)
199     198.968 281(3)
200     199.968 327(3)
201     200.970 303(5)
202     201.970 643(5)
204     203.973 494(3)
81  Tl  thallium    203     202.972 345(9)
205     204.974 428(9)
82  Pb  lead    204     203.973 044(8)
206     205.974 466(8)
207     206.975 897(8)
208     207.976 653(8)
83  Bi  bismuth     209*    208.980 40(1)
90  Th  thorium     230*    230.033 13(2)
232*    232.038 06(2)
91  Pa  protactinium    231*    231.035 88(2)
92  U   uranium     233*    233.039 64(2)
234*    234.040 95(2)
235*    235.043 93(2)
238*    238.050 79(2)
