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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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