| 21. | Chlorine has two stable isotopes and one radioactive isotope : the cosmogenic isotope 36 Cl.
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| 22. | Also a study involving stable isotope ratios might include the molecule 18 O 16 O.
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| 23. | :Gold only has one stable isotope ( 197 ).
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| 24. | Arsenic occurs in nature as a monoisotopic element, composed of one stable isotope, 75 As.
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| 25. | The primary decay mode before the most abundant stable isotope 51 V is electron capture.
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| 26. | Most ( 66 of 94 ) naturally occurring elements have more than one stable isotope.
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| 27. | The most stable isotope of dubnium is 268 Db.
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| 28. | In theory, any element with two stable isotopes can be used as an isotopic tracer.
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| 29. | Like all artificial elements, it has no stable isotopes.
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| 30. | Radon is chemically stable, but it is radioactive and does not have a stable isotope.
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