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13 April, 20:19

Which radioactive isotope would take the least amount of time to become stable? rubidium-91 iodine-131 cesium-135 uranium-238

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  1. 13 April, 20:40
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    The radioactive isotope that would take the least amount of time to become stable is rubidium-91. This is because this isotope is the most stable compared to the rest. This was determined by subtracting its atomic mass by its atomic number. The isotope with the least number of difference is the most stable, while the one with the greatest difference is the most unstable.

    Difference:

    Rubidium: 54 (most stable)

    Iodine: 78

    Cesium: 80

    Uranium: 146 (least stable)
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