Tabla De Abundancias Isotopicas
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Publicado: 7 de febrero de 2013
Table of Isotopic Masses and Natural Abundances
This table lists the mass and percent natural abundance for the stable nuclides. The mass of the longest lived
isotope is given for elements without a stable nuclide. Nuclides marked with an asterisk (*) in the abundance column
indicate that it is not present in nature or that a meaningful natural abundance cannot be given. The isotopic massdata is from G. Audi, A. H. Wapstra Nucl. Phys A. 1993, 565, 1-65 and G. Audi, A. H. Wapstra Nucl. Phys A. 1995,
595, 409-480. The percent natural abundance data is from the 1997 report of the IUPAC Subcommittee for Isotopic
Abundance Measurements by K.J.R. Rosman, P.D.P. Taylor Pure Appl. Chem. 1999, 71, 1593-1607.
Z
Name
Symbol
Mass of Atom
(u)
%
Abundance
%
AbundanceTritium
3.016049
Sulphur
32
31.972071
94.93
33
32.971458
0.76
33.967867
4.29
36
S
35.967081
0.02
35
Cl
34.968853
75.78
37
36.965903
24.22
36
35.967546
38
37.962732
0.0632
39.962383
99.6003
39
38.963707
93.2581
39.963999
0.0117
41
K
40.961826
6.7302
40
Ca
39.962591
96.941
420.115
16
40
2.014102
3
30.973762
41.958618
0.647
*
P
H
H
H
S
S
S
Helium
3
3.016029
0.000137
4
2
4.002603
99.999863
He
He
17
Lithium
6
6.015122
7.016004
92.41
Li
Li
Cl
18
4
Beryllium
Chlorine
7.59
7
3
9
Be
9.012182
Argon
100
Ar
Ar
Ar
Boron
10
10.012937
11.00930580.1
B
B
19
Potassium
K
K
12.000000
98.93
13.003355
1.07
14
Carbon
12
13
6
0.3365
19.9
11
5
100
99.9885
2
31
40
1.007825
Phosphorus
34
Hydrogen
Deuterium
1
Name
15
1
Symbol
Mass of Atom
(u)
Z
14.003242
*
C
C
C
20
Calcium
Ca
14.003074
99.632
43
42.958767
0.13515.000109
0.368
44
43.955481
2.086
46
Nitrogen
14
15
7
45.953693
0.004
48
47.952534
0.187
45
44.955910
N
N
Ca
Ca
Ca
15.994915
99.757
16.999132
0.038
18
Oxygen
16
17
8
17.999160
0.205
O
O
O
21
Scandium
22
Titanium
Sc
100
Fluorine
F
18.998403
100
46
45.952629
47
9
19Ca
46.951764
7.44
Ti
Ti
8.25
Neon
20
19.992440
90.48
48
47.947947
73.72
21
10
20.993847
0.27
49
48.947871
5.41
9.25
50
49.944792
5.18
Ne
Ne
22
21.991386
23
22.989770
Ne
Ti
Ti
Ti
100
23.985042
10.00
25.982593
50
Cr
49.946050
4.345
51.940512
83.789
52.940654
9.501
54Cr
11.01
0.250
99.750
52
Vanadium
53.938885
2.365
Mn
54.938050
V
78.99
24.985837
26
Magnesium
24
25
12
23
50.943964
53
Na
49.947163
V
Sodium
50
51
11
Mg
Mg
Mg
24
Chromium
Cr
Cr
13
Aluminum
27
14
Silicon
28
27.976927
92.2297
29
28.976495
4.6832
30
29.973770
3.0872
AlSi
Si
Si
26.981538
100
25
Manganese
55
26
Iron
54
53.939615
5.845
56
55.934942
91.754
Fe
Fe
100
%
Abundance
56.935399
2.119
58
57.933280
0.282
Fe
Fe
Name
38
Strontium
84
83.913425
0.56
85.909262
9.86
87
Z
%
Abundance
86.908879
7.00
88
Symbol
Mass of Atom
(u)
86
NameMass of Atom
(u)
57
Z
87.905614
82.58
Symbol
Sr
Sr
27
Cobalt
59
Co
58.933200
100
Sr
Sr
57.935348
68.0769
59.930791
26.2231
61
60.931060
1.1399
62
61.928349
3.6345
64
Nickel
58
60
28
63.927970
0.9256
Ni
Ni
Ni
Ni
39
Yttrium
89
Y
88.905848
40
Zirconium
90
Zr
89.904704...
This table lists the mass and percent natural abundance for the stable nuclides. The mass of the longest lived
isotope is given for elements without a stable nuclide. Nuclides marked with an asterisk (*) in the abundance column
indicate that it is not present in nature or that a meaningful natural abundance cannot be given. The isotopic massdata is from G. Audi, A. H. Wapstra Nucl. Phys A. 1993, 565, 1-65 and G. Audi, A. H. Wapstra Nucl. Phys A. 1995,
595, 409-480. The percent natural abundance data is from the 1997 report of the IUPAC Subcommittee for Isotopic
Abundance Measurements by K.J.R. Rosman, P.D.P. Taylor Pure Appl. Chem. 1999, 71, 1593-1607.
Z
Name
Symbol
Mass of Atom
(u)
%
Abundance
%
AbundanceTritium
3.016049
Sulphur
32
31.972071
94.93
33
32.971458
0.76
33.967867
4.29
36
S
35.967081
0.02
35
Cl
34.968853
75.78
37
36.965903
24.22
36
35.967546
38
37.962732
0.0632
39.962383
99.6003
39
38.963707
93.2581
39.963999
0.0117
41
K
40.961826
6.7302
40
Ca
39.962591
96.941
420.115
16
40
2.014102
3
30.973762
41.958618
0.647
*
P
H
H
H
S
S
S
Helium
3
3.016029
0.000137
4
2
4.002603
99.999863
He
He
17
Lithium
6
6.015122
7.016004
92.41
Li
Li
Cl
18
4
Beryllium
Chlorine
7.59
7
3
9
Be
9.012182
Argon
100
Ar
Ar
Ar
Boron
10
10.012937
11.00930580.1
B
B
19
Potassium
K
K
12.000000
98.93
13.003355
1.07
14
Carbon
12
13
6
0.3365
19.9
11
5
100
99.9885
2
31
40
1.007825
Phosphorus
34
Hydrogen
Deuterium
1
Name
15
1
Symbol
Mass of Atom
(u)
Z
14.003242
*
C
C
C
20
Calcium
Ca
14.003074
99.632
43
42.958767
0.13515.000109
0.368
44
43.955481
2.086
46
Nitrogen
14
15
7
45.953693
0.004
48
47.952534
0.187
45
44.955910
N
N
Ca
Ca
Ca
15.994915
99.757
16.999132
0.038
18
Oxygen
16
17
8
17.999160
0.205
O
O
O
21
Scandium
22
Titanium
Sc
100
Fluorine
F
18.998403
100
46
45.952629
47
9
19Ca
46.951764
7.44
Ti
Ti
8.25
Neon
20
19.992440
90.48
48
47.947947
73.72
21
10
20.993847
0.27
49
48.947871
5.41
9.25
50
49.944792
5.18
Ne
Ne
22
21.991386
23
22.989770
Ne
Ti
Ti
Ti
100
23.985042
10.00
25.982593
50
Cr
49.946050
4.345
51.940512
83.789
52.940654
9.501
54Cr
11.01
0.250
99.750
52
Vanadium
53.938885
2.365
Mn
54.938050
V
78.99
24.985837
26
Magnesium
24
25
12
23
50.943964
53
Na
49.947163
V
Sodium
50
51
11
Mg
Mg
Mg
24
Chromium
Cr
Cr
13
Aluminum
27
14
Silicon
28
27.976927
92.2297
29
28.976495
4.6832
30
29.973770
3.0872
AlSi
Si
Si
26.981538
100
25
Manganese
55
26
Iron
54
53.939615
5.845
56
55.934942
91.754
Fe
Fe
100
%
Abundance
56.935399
2.119
58
57.933280
0.282
Fe
Fe
Name
38
Strontium
84
83.913425
0.56
85.909262
9.86
87
Z
%
Abundance
86.908879
7.00
88
Symbol
Mass of Atom
(u)
86
NameMass of Atom
(u)
57
Z
87.905614
82.58
Symbol
Sr
Sr
27
Cobalt
59
Co
58.933200
100
Sr
Sr
57.935348
68.0769
59.930791
26.2231
61
60.931060
1.1399
62
61.928349
3.6345
64
Nickel
58
60
28
63.927970
0.9256
Ni
Ni
Ni
Ni
39
Yttrium
89
Y
88.905848
40
Zirconium
90
Zr
89.904704...
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