#monoisotopic information
; Elemental composition and isotopic abundances, as of 2001-02-27
;
; Source of Data:
; Coursey, J. S. and Dragoset, R. A. (2000). Atomic Weights and Isotopic Compositions (version 2.1).
; http://physics.nist.gov/Compositions [2001, February 27].
; National Institute of Standards and Technology, Gaithersburg, MD.
; Originally published as:
; R. D. Vocke, Jr., Atomic Weights of the Elements 1997, Pure Appl. Chem., 71(8), 1593 (1999)
; K.J.R. Rosman and P.D.P. Taylor, Isotopic Compositions of the Elements 1997, J. Phys. Chem. Ref. Data, 27(6), 1275 (1998)
; G. Audi and A. H. Wapstra, The 1995 Update To The Atomic Mass Evaluation, Nuclear Physics A, 595(4), 409 (1995).
;
; The IUPAC's biennial review of atomic weight determinations warranted no changes to the standard atomic weights
; from that published in Atomic Weights of the Elements 1995 other than a change to the footnote for Lithium.
; -- R. D. Vocke, Jr., Atomic Weights of the Elements 1997, Pure Appl. Chem., 71(8), 1593 (1999).
;
;atw	sym	mass	%RA		Valence
#e- added for compatability with masshunter -jon:
#isotope list added
#small errors corrected
0	e-	0.00054857990946	100	1
1	H	1.0078250321	99.9850	1	D,T
2	D	2.0141017780	0.0115	1
3	T	3.0160492675	0	1
3	[3]He	3.0160293097	0.000137	0
4	He	4.0026032497	99.999863	0	[3]He
6	[6]Li	6.0151223	7.59	1
7	Li	7.0160040	92.41	1	[6]Li
9	Be	9.0121821	100	2
10	[10]B	10.0129370	19.9	3
11	B	11.0093055	80.1	3	[10]B
12	C	12.0000000	98.93	4	[13]C
13	[13]C	13.0033548378	1.07	4
14	N	14.0030740052	99.632	3	[15]N
15	[15]N	15.0001088984	0.368	3
16	O	15.9949146221	99.757	2	[17]O,[18]O
17	[17]O	16.99913150	0.038	2
18	[18]O	17.9991604	0.205	2
19	F	18.99840320	100	1
20	Ne	19.9924401759	90.48	0	[21]Ne,[22]Ne
21	[21]Ne	20.99384674	0.27	0
22	[22]Ne	21.99138551	9.25	0
23	Na	22.98976967	100	1
24	Mg	23.98504190	78.99	2	[25]Mg,[26]Mg
25	[25]Mg	24.98583702	10.00	2
26	[26]Mg	25.98259304	11.01	2
27	Al	26.98153844	100	3
28	Si	27.9769265327	92.2297	4	[29]Si,[30]Si
29	[29]Si	28.97649472	4.6832	4
30	[30]Si	29.97377022	3.0872	4
31	P	30.97376151	100	3
32	S	31.97207069	94.93	2	[33]S,[34]S,[35]S
33	[33]S	32.97145850	0.76	2
34	[34]S	33.96786683	4.29	2
36	[35]S	35.96708088	0.02	2
35	Cl	34.96885271	75.78	1	[37]Cl
37	[37]Cl	36.96590260	24.22	1
36	[36]Ar	35.96754628	0.3365	0
38	[38]Ar	37.9627322	0.0632	0
40	Ar	39.962383123	99.6003	0	[36]Ar,[38]Ar
39	K	38.9637069	93.2581	1	[40]K,[41]K
40	[40]K	39.96399867	0.0117	1
41	[41]K	40.96182597	6.7302	1
40	Ca	39.9625912	96.941	2	[42]Ca,[43]Ca,[44]Ca,[46]Ca,[47]Ca
42	[42]Ca	41.9586183	0.647	2
43	[43]Ca	42.9587668	0.135	2
44	[44]Ca	43.9554811	2.086	2
46	[46]Ca	45.9536928	0.004	2
48	[47]Ca	47.952534	0.187	2
45	Sc	44.9559102	100	3
46	[46]Ti	45.9526295	8.25	2
47	[47]Ti	46.9517638	7.44	2
48	Ti	47.9479471	73.72	2	[46]Ti,[47]Ti
49	[49]Ti	48.9478708	5.41	2
50	[50]Ti	49.9447921	5.18	2
50	[50]V	49.9471628	0.250	2
51	V	50.9439637	99.750	2	[50]V
50	[50]Cr	49.9460496	4.345	2
52	Cr	51.9405119	83.789	2	[50]Cr,[53]Cr,[54]Cr
53	[53]Cr	52.9406538	9.501	2
54	[54]Cr	53.9388849	2.365	2
55	Mn	54.9380496	100	2
54	[54]Fe	53.9396148	5.845	2
56	Fe	55.9349421	91.754	2	[54]Fe,[57]Fe,[58]Fe
57	[57]Fe	56.9353987	2.119	2
58	[58]Fe	57.9332805	0.282	2
59	Co	58.9332002	100	2
58	Ni	57.9353479	68.0769	3	[60]Ni,[61]Ni,[62]Ni,[63]Ni
60	[60]Ni	59.9307906	26.2231	3
61	[61]Ni	60.9310604	1.1399	3
62	[62]Ni	61.9283488	3.6345	3
64	[63]Ni	63.9279696	0.9256	3
63	Cu	62.9296011	69.17	2	[65]Cu
65	[65]Cu	64.9277937	30.83	2
64	Zn	63.9291466	48.63	2	[66]Zn,[67]Zn,[68]Zn,[70]Zn
66	[66]Zn	65.9260368	27.90	2
67	[67]Zn	66.9271309	4.10	2
68	[68]Zn	67.9248476	18.75	2
70	[70]Zn	69.925325	0.62	2
69	Ga	68.925581	60.108	3	[71]Ga
71	[71]Ga	70.9247050	39.892	3
70	[70]Ge	69.9242504	20.84	2
72	[72]Ge	71.9220762	27.54	2
73	[73]Ge	72.9234594	7.73	2
74	Ge	73.9211782	36.28	2	[70]Ge,[72]Ge,[73]Ge,[76]Ge
76	[76]Ge	75.9214027	7.61	2
75	As	74.9215964	100	0
74	[74]Se	73.9224766	0.89	4
76	[76]Se	75.9192141	9.37	4
77	[77]Se	76.9199146	7.63	4
78	[78]Se	77.9173095	23.77	4
80	Se	79.9165218	49.61	4	[74]Se,[76]Se,[77]Se,[78]Se,[82]Se
82	[82]Se	81.9167000	8.73	4
79	Br	78.9183376	50.69	1	[81]Br
81	[81]Br	80.916291	49.31	1
78	[78]Kr	77.920386	0.35	0
80	[80]Kr	79.916378	2.28	0
82	[82]Kr	81.9134846	11.58	0
83	[83]Kr	82.914136	11.49	0
84	Kr	83.911507	57.00	0	[78]Kr,[80]Kr,[82]Kr,[83]Kr,[86]Kr
86	[86]Kr	85.9106103	17.30	0
85	Rb	84.9117893	72.17	2	[87]Rb
87	[87]Rb	86.9091835	27.83	2
84	[84]Sr	83.913425	0.56	2
86	[86]Sr	85.9092624	9.86	2
87	[87]Sr	86.9088793	7.00	2
88	Sr	87.9056143	82.58	2	[84]Sr,[86]Sr,[87]Sr
89	Y	88.9058479	100	3
90	Zr	89.9047037	51.45	4	[91]Zr,[92]Zr,[94]Zr,[96]Zr
91	[91]Zr	90.9056450	11.22	4
92	[92]Zr	91.9050401	17.15	4
94	[94]Zr	93.9063158	17.38	4
96	[96]Zr	95.908276	2.80	4
93	Nb	92.9063775	100	2
92	[92]Mo	91.906810	14.84	2
94	[94]Mo	93.9050876	9.25	2
95	[95]Mo	94.9058415	15.92	2
96	[96]Mo	95.9046789	16.68	2
97	[97]Mo	96.9060210	9.55	2
98	Mo	97.9054078	24.13	2	[92]Mo,[94]Mo,[95]Mo,[96]Mo,[97]Mo,[100]Mo
100	[100]Mo	99.907477	9.63	2
97	Tc	96.906365	100	2	[98]Tc,[99]Tc
98	[98]Tc	97.907216	0	2
99	[99]Tc	98.9062546	0	2
96	[96]Ru	95.907598	5.54	0
98	[98]Ru	97.905287	1.87	0
99	[99]Ru	98.9059393	12.76	0
100	[100]Ru	99.9042197	12.60	0
101	[101]Ru	100.9055822	17.06	0
102	Ru	101.9043495	31.55	0	[96]Ru,[98]Ru,[99]Ru,[100]Ru,[101]Ru,[104]Ru
104	[104]Ru	103.905430	18.62	0
103	Rh	102.905504	100	2
102	[102]Pd	101.905608	1.02	2
104	[104]Pd	103.904035	11.14	2
105	[105]Pd	104.905084	22.33	2
106	Pd	105.903483	27.33	2	[102]Pd,[104]Pd,[105]Pd,[108]Pd,[110]Pd
108	[108]Pd	107.903894	26.46	2
110	[110]Pd	109.905152	11.72	2
107	Ag	106.905093	51.839	1	[109]Ag
109	[109]Ag	108.904756	48.161	1
106	[106]Cd	105.906458	1.25	2
108	[108]Cd	107.904183	0.89	2
110	[110]Cd	109.903006	12.49	2
111	[111]Cd	110.904182	12.80	2
112	[112]Cd	111.9027572	24.13	2
113	[113]Cd	112.9044009	12.22	2
114	Cd	113.9033581	28.73	2	[106]Cd,[108]Cd,[110]Cd,[111]Cd,[112]Cd,[113]Cd,[116]Cd
116	[116]Cd	115.904755	7.49	2
113	[113]In	112.904061	4.29	3
115	In	114.903878	95.71	3	[113]In
112	[112]Sn	111.904821	0.97	4
114	[114]Sn	113.902782	0.66	4
115	[115]Sn	114.903346	0.34	4
116	[116]Sn	115.901744	14.54	4
117	[117]Sn	116.902954	7.68	4
118	[118]Sn	117.901606	24.22	4
119	[119]Sn	118.903309	8.59	4
120	Sn	119.9021966	32.58	4	[112]Sn,[114]Sn,[115]Sn,[116]Sn,[117]Sn,[118]Sn,[119]Sn,[122]Sn,[124]Sn
122	[122]Sn	121.9034401	4.63	4
124	[124]Sn	123.9052746	5.79	4
121	Sb	120.9038180	57.21	0	[123]Sb
123	[123]Sb	122.9042157	42.79	0
120	[120]Te	119.904020	0.09	2
122	[122]Te	121.9030471	2.55	2
123	[123]Te	122.9042730	0.89	2
124	[124]Te	123.9028195	4.74	2
125	[125]Te	124.9044247	7.07	2
126	[126]Te	125.9033055	18.84	2
128	[128]Te	127.9044614	31.74	2
130	Te	129.9062228	34.08	2	[120]Te,[122]Te,[123]Te,[124]Te,[125]Te,[126]Te,[128]Te
127	I	126.904468	100	1
124	[124]Xe	123.9058958	0.09	0
126	[126]Xe	125.904269	0.09	0
128	[128]Xe	127.9035304	1.92	0
129	[129]Xe	128.9047795	26.44	0
130	[130]Xe	129.9035079	4.08	0
131	[131]Xe	130.9050819	21.18	0
132	Xe	131.9041545	26.89	0	[124]Xe,[126]Xe,[128]Xe,[129]Xe,[130]Xe,[131]Xe
134	[134]Xe	133.9053945	10.44	0
136	[136]Xe	135.907220	8.87	0
133	Cs	132.905447	100	1
130	[130]Ba	129.906310	0.106	2
132	[132]Ba	131.905056	0.101	2
134	[134]Ba	133.904503	2.417	2
135	[135]Ba	134.905683	6.592	2
136	[136]Ba	135.904570	7.854	2
137	[137]Ba	136.905821	11.232	2
138	Ba	137.905241	71.698	2	[130]Ba,[132]Ba,[134]Ba,[135]Ba,[136]Ba,[137]Ba
138	[138]La	137.907107	0.090	3
139	La	138.906348	99.910	3	[138]La
136	[136]Ce	135.907140	0.185	3
138	[138]Ce	137.905986	0.251	3
140	Ce	139.905434	88.450	3	[136]Ce,[138]Ce,[142]Ce
142	[142]Ce	141.909240	11.114	3
141	Pr	140.907648	100	4
142	Nd	141.907719	27.2	3	[143]Nd,[144]Nd,[145]Nd,[146]Nd,[148]Nd,[150]Nd
143	[143]Nd	142.909810	12.2	3
144	[144]Nd	143.910083	23.8	3
145	[145]Nd	144.912569	8.3	3
146	[146]Nd	145.913112	17.2	3
148	[148]Nd	147.916889	5.7	3
150	[150]Nd	149.920887	5.6	3
145	Pm	144.912744	0	3	[147]Pm
147	[147]Pm	146.915134	0	3
144	[144]Sm	143.911995	3.07	3
147	[147]Sm	146.914893	14.99	3
148	[148]Sm	147.914818	11.24	3
149	[149]Sm	148.917180	13.82	3
150	[150]Sm	149.917271	7.38	3
152	Sm	151.919728	26.75	3	[144]Sm,[147]Sm,[148]Sm,[149]Sm,[150]Sm,[154]Sm
154	[154]Sm	153.922205	22.75	3
151	[151]Eu	150.919846	47.81	3
153	Eu	152.921226	52.19	3	[151]Eu
152	[152]Gd	151.919788	0.20	3
154	[154]Gd	153.920862	2.18	3
155	[155]Gd	154.922619	14.80	3
156	[156]Gd	155.922120	20.47	3
157	[157]Gd	156.923957	15.65	3
158	Gd	157.924101	24.84	3	[152]Gd,[154]Gd,[155]Gd,[156]Gd,[157]Gd,[160]Gd
160	[160]Gd	159.927051	21.86	3
159	Tb	158.925343	100	4
156	[156]Dy	155.924278	0.06	3
158	[158]Dy	157.924405	0.10	3
160	[160]Dy	159.925194	2.34	3
161	[161]Dy	160.926930	18.91	3
162	[162]Dy	161.926795	25.51	3
163	[163]Dy	162.928728	24.90	3
164	Dy	163.929171	28.18	3	[156]Dy,[158]Dy,[160]Dy,[161]Dy,[162]Dy,[163]Dy
165	Ho	164.930319	100	3
162	[162]Er	161.928775	0.14	3
164	[164]Er	163.929197	1.61	3
166	Er	165.930290	33.61	3	[162]Er,[164]Er,[167]Er,[168]Er,[170]Er
167	[167]Er	166.932045	22.93	3
168	[168]Er	167.932368	26.78	3
170	[170]Er	169.935460	14.93	3
169	Tm	168.934211	100	3
168	[168]Yb	167.933894	0.13	3
170	[170]Yb	169.934759	3.04	3
171	[171]Yb	170.936322	14.28	3
172	[172]Yb	171.9363777	21.83	3
173	[173]Yb	172.9382068	16.13	3
174	Yb	173.9388581	31.83	3	[168]Yb,[170]Yb,[171]Yb,[172]Yb,[173]Yb,[176]Yb
176	[176]Yb	175.942568	12.76	3
175	Lu	174.9407679	97.41	3	[176]Lu
176	[176]Lu	175.9426824	2.59	3
174	[174]Hf	173.940040	0.16	4
176	[176]Hf	175.9414018	5.26	4
177	[177]Hf	176.9432200	18.60	4
178	[178]Hf	177.9436977	27.28	4
179	[179]Hf	178.9458151	13.62	4
180	Hf	179.9465488	35.08	4	[174]Hf,[176]Hf,[177]Hf,[178]Hf,[179]Hf
180	[180]Ta	179.947466	0.012	3
181	Ta	180.947996	99.988	3	[180]Ta
180	[180]W	179.946706	0.12	5
182	[182]W	181.948206	26.50	5
183	[183]W	182.9502245	14.31	5
184	W	183.9509326	30.64	5	[180]W,[182]W,[183]W,[186]W
186	[186]W	185.954362	28.43	5
185	[185]Re	184.9529557	37.40	2
187	Re	186.9557508	62.60	2	[185]Re
184	[184]Os	183.952491	0.02	4
186	[186]Os	185.953838	1.59	4
187	[187]Os	186.9557479	1.96	4
188	[188]Os	187.9558360	13.24	4
189	[189]Os	188.9581449	16.15	4
190	[190]Os	189.958445	26.26	4
192	Os	191.961479	40.78	4	[184]Os,[186]Os,[187]Os,[188]Os,[190]Os
191	[191]Ir	190.960591	37.3	4
193	Ir	192.962924	62.7	4	[191]Ir
190	[190]Pt	189.959930	0.014	4
192	[192]Pt	191.961035	0.782	4
194	[194]Pt	193.962664	32.967	4
195	Pt	194.964774	33.832	4	[190]Pt,[192]Pt,[194]Pt,[196]Pt,[193]Pt
196	[196]Pt	195.964935	25.242	4
198	[193]Pt	197.967876	7.163	4
197	Au	196.966552	100	3
196	[196]Hg	195.965815	0.15	2
198	[198]Hg	197.966752	9.97	2
199	[199]Hg	198.968262	16.87	2
200	[200]Hg	199.968309	23.10	2
201	[201]Hg	200.970285	13.18	2
202	Hg	201.970626	29.86	2	[196]Hg,[198]Hg,[199]Hg,[200]Hg,[201]Hg,[204]Hg
204	[204]Hg	203.973476	6.87	2
203	[203]Tl	202.972329	29.524	3
205	Tl	204.974412	70.476	3	[203]Tl
204	[204]Pb	203.973029	1.4	2
206	[206]Pb	205.974449	24.1	2
207	[207]Pb	206.975881	22.1	2
208	Pb	207.976636	52.4	2	[204]Pb,[206]Pb,[207]Pb
209	Bi	208.980383	100	3
209	Po	208.982416	0	0	[210]Po
210	[210]Po	209.982857	0	0
210	At	209.987131	0	0	[211]At
211	[211]At	210.987481	0	0
211	Rn	210.990585	0	0	[220]Rn,[222]Rn
220	[220]Rn	220.0113841	0	0
222	[222]Rn	222.0175705	0	0
223	Fr	223.0197307	0	1
223	Ra	223.018497	0	2	[224]Ra,[226]Ra,[228]Ra
224	[224]Ra	224.0202020	0	2
226	[226]Ra	226.0254026	0	2
228	[228]Ra	228.0310641	0	2
227	Ac	227.0277470	0	0
230	[230]Th	230.0331266	0	4
232	Th	232.0380504	100	4	[230]Th
231	Pa	231.0358789	100	4
233	[233]U	233.039628	0	6
234	[234]U	234.0409456	0.0055	6
235	[235]U	235.0439231	0.7200	6
236	[236]U	236.0455619	0	6
238	U	238.0507826	99.2745	6	[233]U,[234]U,[235]U,[236]U
237	Np	237.0481673	0	3	[239]Np
239	[239]Np	239.0529314	0	3
238	Pu	238.0495534	0	0	[239]Pu,[240]Pu,[241]Pu,[242]Pu,[244]Pu
239	[239]Pu	239.0521565	0	0
240	[240]Pu	240.0538075	0	0
241	[241]Pu	241.0568453	0	0
242	[242]Pu	242.0587368	0	0
244	[244]Pu	244.064198	0	0
241	Am	241.0568229	0	2	[243]Am
243	[243]Am	243.0613727	0	2
243	Cm	243.0613822	0	3	[244]Cm,[245]Cm,[246]Cm,[247]Cm,[248]Cm
244	[244]Cm	244.0627463	0	3
245	[245]Cm	245.0654856	0	3
246	[246]Cm	246.0672176	0	3
247	[247]Cm	247.070347	0	3
248	[248]Cm	248.072342	0	3
247	Bk	247.070299	0	3	[249]Bk
249	[249]Bk	249.074980	0	3
249	Cf	249.074847	0	0	[250]Cf,[251]Cf,[252]Cf
250	[250]Cf	250.0764000	0	0
251	[251]Cf	251.079580	0	0
252	[252]Cf	252.081620	0	0
252	Es	252.082970	0	0
257	Fm	257.095099	0	0
256	Md	256.094050	0	0	[258]Md
258	[258]Md	258.098425	0	0
259	No	259.101020	0	0
262	Lr	262.109690	0	0
261	Rf	261.108750	0	0
262	Db	262.114150	0	0
263	Sg	263.118310	0	0
264	Bh	264.124730	0	0
265	Hs	265.130000	0	0
268	Mt	268.138820	0	0
269	Uun	269.145140	0	0
272	Uuu	272.153480	0	0