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[ Home > Resources > Education > Periodic Table of the Elements ]
Common Isotopes

Isotope

Ci/g

Ci/L to ppm
multiply by:

ppm to Ci/L
multiply by:

Ac-227

72.9

1.37E+01

7.29E-02

Ac-228

2.24E+06

4.46E-04

2.24E+03

Am-241

3.24E+00

3.09E+02

3.24E-03

Am-242m

9.72E+00

1.03E+02

9.72E-03

Am-242

8.09E+05

1.24E-03

8.09E+02

Am-243

1.85E-01

5.41E+03

1.85E-04

Am-244

1.27E+06

7.87E-04

1.27E+03

Ba-131

8.31E+04

1.20E-02

8.31E+01

Ba-140

7.29E+04>

1.37E-02

7.29E+01

Cd-109

2.64E+03

3.79E-01

2.64E+00

Cd-115m

2.60E+04

3.85E-02

2.60E+01

Cd-115

5.09E+05

1.96E-03

5.09E+02

Cs-137

87

1.15E+01

8.70E-02

Cs-138

4.20E+07

2.38E-05

4.20E+04

Co-157

8480

1.18E-01

8.48E+00

Co-60

1133

8.83E-01

1.13E+00

Mo-99

4.75E+05

2.11E-03

4.75E+02

Np-237

7.05E-04

1.42E+06

7.05E-07

Np-239

2.33E+05

4.29E-03

2.33E+02

Pu-238

17.4

5.75E+01

1.74E-02

Pu-239

0.0614

1.63E+04

6.14E-05

Pu-240

0.226

4.42E+03

2.26E-04

Pu-241

112

8.93E+00

1.12E-01

Pu-242

3.90E-03

2.56E+05

3.90E-06

Pu-243

2.59E+06

3.86E-04

2.59E+03

Pu-244

1.90E-05

5.26E+07

1.90E-08

Sr-89

2.78E+04

3.60E-02

2.78E+01

Sr-90

143

6.99E+0

1.4E-01

U-235

2.10E-06

4.76E+08

2.10E-09

U-238

3.33E-07

3.00E+09

3.33E-10