Tabla De Abundancias Isotopicas

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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...
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