Proteomics Tools

Isotopic Masses and Natural Abundances

Z

Name

Symbol

Mass of Atom (u)

% Abundance

1 Hydrogen
Deuterium
Tritium
1H
2H
3H
1.007825
2.014102
3.016049
99.9885
0.115
*
2 Helium 3He
4He
3.016029
4.002603
0.000137
99.999863
3 Lithium 6Li
7Li
6.015122
7.016004
7.59
92.41
4 Beryllium 9Be 9.012182 100
5 Boron 10B
11B
10.012937
11.009305
19.9
80.1
6 Carbon 12C
13C
14C
12.000000
13.003355
14.003242
98.93
1.07
*
7 Nitrogen 14N
15N
14.003074
15.000109
99.632
0.368
8 Oxygen 16O
17O
18O
15.994915
16.999132
17.999160
99.757
0.038
0.205
9 Fluorine 19F 18.998403 100
10 Neon 20Ne
21Ne
22Ne
19.992440
20.993847
21.991386
90.48
0.27
9.25
11 Sodium 23Na 22.98770 100
12 Magnesium 24Mg
25Mg
26Mg
23.985042
24.985837
25.982593
78.99
10
11.01
13 Aluminum 27Al 26.981538 100
14 Silicon 28Si
29Si
30Si
27.976927
28.976495
29.973770
92.2297
4.6832
3.0872
15 Phosphorus 31P 30.973762 100
16 Sulpher 32S
33S
34S
36S
31.972071
32.971458
33.967867
35.967081
94.93
0.76
4.29
0.02
17 Chlorine 35Cl
37Cl
34.968853
36.965903
75.78
24.22
18 Argon 36Ar
38Ar
40Ar
35.967546
37.962732
39.962383
0.3365
0.0632
99.6003
19 Potassium 39K
40K
41K
38.963707
39.963999
40.961826
93.2581
0.0117
6.7302
20 Calcium 40Ca
42Ca
43Ca
44Ca
46Ca
48Ca
39.962591
41.958618
42.958767
43.955481
45.953693
47.952534
96.941
0.647
0.135
2.086
0.004
0.187
21 Scandium 45Sc 44.955910 100
22 Titanium 46Ti
47Ti
48Ti
49Ti
50Ti
45.952629
46.951764
47.947947
48.947871
49.944792
8.25
7.44
73.72
5.41
5.18
23 Vanadium 50V
51V
49.947163
50.943964
0.250
99.750
24 Chromium 50Cr
52Cr
53Cr
54Cr
49.946050
51.940512
52.940654
53.938885
4.345
83.789
9.501
2.365
25 Manganese 55Mn 54.938050 100
26 Iron 54Fe
56Fe
57Fe
58Fe
53.939615
55.934942
56.935399
57.933280
5.845
91.754
2.119
0.282
27 Cobalt 59Co 58.933200 100
28 Nickel 58Ni
60Ni
61Ni
62Ni
64Ni
57.935348
59.930791
60.931060
61.928349
63.927970
68.0769
26.2231
1.1399
3.6345
0.9256
29 Copper 63Cu
65Cu
62.929601
64.927794
69.17
30.83
30 Zinc 64Zn
66Zn
67Zn
68Zn
70Zn
63.929147
65.926037
66.927131
67.924848
69.925325
48.63
27.90
4.10
18.75
0.62
31 Gallium 69Ga
71Ga
68.925581
70.924705
60.108
39.892
32 Germanium 70Ge
72Ge
73Ge
74Ge
76Ge
69.924250
71.922076
72.923459
73.921178
75.921403
20.84
27.54
7.73
36.28
7.61
33 Arsenic 75As 74.921596 100
34 Selenium 74Se
76Se
77Se
78Se
80Se
82Se
73.922477
75.919214
76.919915
77.917310
79.916522
81.916700
0.89
9.37
7.63
23.77
49.61
8.73
35 Bromine 79Br
81Br
78.918338
80.916291
50.69
49.31
36 Krypton 78Kr
80Kr
82Kr
83Kr
84Kr
86Kr
77.920386
79.916378
81.913485
82.914136
83.911507
85.910610
0.35
2.28
11.58
11.49
57.00
17.30
37 Rubidium 85Rb
87Rb
84.911789
86.909183
72.17
27.83
38 Strontium 84Sr
86Sr
87Sr
88Sr
83.913425
85.909262
86.908879
87.905614
0.56
9.86
7.00
82.58
39 Yttrium 89Y 88.905848 100
40 Zirconium 90Zr
91Zr
92Zr
94Zr
96Zr
89.904704
90.905645
91.905040
93.906316
95.908276
51.45
11.22
17.15
17.38
2.80
41 Niobium 93Nb 92.906378 100
42 Molybdenum 92Mo
94Mo
95Mo
96Mo
97Mo
98Mo
100Mo
91.906810
93.905088
94.905841
95.904679
96.906021
97.905408
99.907477
14.84
9.25
15.92
16.68
9.55
24.13
9.63
43 Technetium 98Tc 97.907216 *
44 Ruthenium 96Ru
98Ru
99Ru
100Ru
101Ru
102Ru
104Ru
95.907598
97.905287
98.905939
99.904220
100.905582
101.904350
103.905430
5.54
1.87
12.76
12.60
17.06
31.55
18.62
45 Rhodium 103Rh 102.905504 100
46 Palladium 102Pd
104Pd
105Pd
106Pd
108Pd
110Pd
101.905608
103.904035
104.905084
105.903483
107.903894
109.905152
1.02
11.14
22.33
27.33
26.46
11.72
47 Silver 107Ag
109Ag
106.905093
108.904756
51.839
48.161
48 Cadmium 106Cd
108Cd
110Cd
111Cd
112Cd
113Cd
114Cd
116Cd
105.906458
107.904183
109.903006
110.904182
111.902757
112.904401
113.903358
115.904755
1.25
0.89
12.49
12.80
24.13
12.22
28.73
7.49
49 Indium 113In
115In
112.904061
114.903878
4.29
95.71
50 Tin 112Sn
114Sn
115Sn
116Sn
117Sn
118Sn
119Sn
120Sn
122Sn
124Sn
111.904821
113.902782
114.903346
115.901744
116.902954
117.901606
118.903309
119.902197
121.903440
123.905275
0.97
0.66
0.34
14.54
7.68
24.22
8.59
32.58
4.63
5.79
51 Antimony 121Sb
123Sb
120.903818
122.904216
57.21
42.79
52 Tellurium 120Te
122Te
123Te
124Te
125Te
126Te
128Te
130Te
119.904020
121.903047
122.904273
123.902819
124.904425
125.903306
127.904461
129.906223
0.09
2.55
0.89
4.74
7.07
18.84
31.74
34.08
53 Iodine 127I 126.904468 100
54 Xenon 124Xe
126Xe
128Xe
129Xe
130Xe
131Xe
132Xe
134Xe
136Xe
123.905896
125.904269
127.903530
128.904779
129.903508
130.905082
131.904154
133.905395
135.907220
0.09
0.09
1.92
26.44
4.08
21.18
26.89
10.44
8.87
55 Cesium 133Cs 132.905447 100
56 Barium 130Ba
132Ba
134Ba
135Ba
136Ba
137Ba
138Ba
129.906310
131.905056
133.904503
134.905683
135.904570
136.905821
137.905241
0.106
0.101
2.417
6.592
7.854
11.232
71.698
57 Lanthanum 138La
139La
137.907107
138.906348
0.090
99.910
58 Cerium 136Ce
138Ce
140Ce
142Ce
135.907144
137.905986
139.905434
141.909240
0.185
0.251
88.450
11.114
59 Praseodymium 141Pr 140.907648 100
60 Neodymium 142Nd
143Nd
144Nd
145Nd
146Nd
148Nd
150Nd
141.907719
142.909810
143.910083
144.912569
145.913112
147.916889
149.920887
27.2
12.2
23.8
8.3
17.2
5.7
5.6
61 Promrthium 145Pm 144.912744 *
62 Samarium 144Sm
147Sm
148Sm
149Sm
150Sm
152Sm
154Sm
143.911995
146.914893
147.914818
148.917180
149.917271
151.919728
153.922205
3.07
14.99
11.24
13.82
7.38
26.75
22.75
63 Europium 151Eu
153Eu
150.919846
152.921226
47.81
52.19
64 Gadolinium 152Gd
154Gd
155Gd
156Gd
157Gd
158Gd
160Gd
151.919788
153.920862
154.922619
155.922120
156.923957
157.924101
159.927051
0.20
2.18
14.80
20.47
15.65
24.84
21.86
65 Terbium 159Tb 158.925343 100
66 Dysprosium 156Dy
158Dy
160Dy
161Dy
162Dy
163Dy
164Dy
155.924278
157.924405
159.925194
160.926930
161.926795
162.928728
163.929171
0.06
0.10
2.34
18.91
25.51
24.90
28.18
67 Holmium 165Ho 164.930319 100
68 Erbium 162Er
164Er
166Er
167Er
168Er
170Er
161.928775
163.929197
165.930290
166.932045
167.932368
169.935460
0.14
1.61
33.61
22.93
26.78
14.93
69 Thulium 169Tm 168.934211 100
70 Ytterbium 168Yb
170Yb
171Yb
172Yb
173Yb
174Yb
176Yb
167.933894
169.934759
170.936322
171.936378
172.938207
173.938858
175.942568
0.13
3.04
14.28
21.83
16.13
31.83
12.76
71 Lutetium 175Lu
176Lu
174.940768
175.942682
97.41
2.59
72 Hafnium 174Hf
176Hf
177Hf
178Hf
179Hf
180Hf
173.940040
175.941402
176.943220
177.943698
178.945815
179.946549
0.16
5.26
18.60
27.28
13.62
35.08
73 Tantalum 180Ta
181Ta
179.947466
180.947996
0.012
99.988
74 Tungsten 180W
182W
183W
184W
186W
179.946706
181.948206
182.950224
183.950933
185.954362
0.12
26.50
14.31
30.64
28.43
75 Rhenium 185Re
187Re
184.952956
186.955751
37.40
62.60
76 Osmium 184Os
186Os
187Os
188Os
189Os
190Os
192Os
183.952491
185.953838
186.955748
187.955836
188.958145
189.958445
191.961479
0.02
1.59
1.96
13.24
16.15
26.26
40.78
77 Iridium 191Ir
193Ir
190.960591
192.962924
37.3
62.7
78 Platinum 190Pt
192Pt
194Pt
195Pt
196Pt
198Pt
189.959930
191.961035
193.962664
194.964774
195.964935
197.967876
0.014
0.782
32.967
33.832
25.242
7.163
79 Gold 197Au 196.966552 100
80 Mercury 196Hg
198Hg
199Hg
200Hg
201Hg
202Hg
204Hg
195.965815
197.966752
198.968262
199.968309
200.970285
201.970626
203.973476
0.15
9.97
16.87
23.10
13.18
29.86
6.87
81 Thallium 203Tl
205Tl
202.972329
204.974412
29.524
70.476
82 Lead 204Pb
206Pb
207Pb
208Pb
203.973029
205.974449
206.975881
207.976636
1.4
24.1
22.1
52.4
83 Bismuth 209Bi 208.980383 100
84 Polonium 209Po 208.982416 *
85 Astatine 210At 209.987131 *
86 Radon 222Rn 222.017570 *
87 Francium 223Fr 223.019731 *
88 Radium 226Ra 226.025403 *
89 Actinium 227Ac 227.027747 *
90 Thorium 232Th 232.038050 100
91 Protactinium 231Pa 231.035879 100
92 Uranium 234U
235U
238U
234.040946
235.043923
238.050783
0.0055
0.7200
99.2745
93 Neptunium 237Np 237.048167 *
94 Plutonium 244Pu 244.064198 *
95 Americium 243Am 243.061373 *
96 Curium 247Cm 247.070347 *
97 Berkelium 247Bk 247.070299 *
98 Californium 251Cf 251.079580 *
99 Einsteinium 252Es 252.082972 *
100 Fermium 257Fm 257.095099 *
101 Mendelevium 258Md 258.098425 *
102 Nobelium 259No 259.101024 *
103 Lawrencium 262Lr 262.109692 *
104 Rutherfordium 263Rf 263.118313 *
105 Dubnium 262Db 262.011437 *
106 Seaborgium 266Sg 266.012238 *
107 Bohrium 264Bh 264.012496 *
108 Hassium 269Hs 269.001341 *
109 Meitnerium 268Mt 268.001388 *
110 Ununnilium 272Uun 272.001463 *
111 Unununium 272Uuu 272.001535 *
112 Ununbium 277Uub (277) *
114 Ununquadium 289Uuq (289) *
116 Ununhexium 289Uuh (289) *
118 Ununoctium 293Uuo (293) *


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