| 41. | Sodium has only one stable isotope, sodium-23.
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| 42. | Rosman focused on the ratio of two stable isotopes, or forms, of lead : lead-206 and lead-207.
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| 43. | Stable isotope analysis measures the amount of different isotopes of the same element contained within a specimen.
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| 44. | Its most stable isotope, uraniferous ores processing.
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| 45. | Magnesium has three stable isotopes :, and.
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| 46. | There are no stable isotopes of astatine.
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| 47. | Additionally, astatine has no stable isotopes.
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| 48. | See stable isotope and primordial nuclide.
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| 49. | In practice, these are stable isotopes.
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| 50. | Iodine has only one stable isotope.
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