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Ch.20 - Radioactivity and Nuclear Chemistry

Chapter 20, Problem 37d

Determine whether or not each nuclide is likely to be stable. State your reasons. d. Te-124

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Hey everyone, we're asked to predict whether the isotope below is stable or not And we have, I dine 120 and when we look at our periodic table, we know that it has an atomic number of 53. Now, in order to determine the stability of an isotope, we know that this is dependent on r n oversee ratio where n is equivalent to our atomic mass minus our atomic number. Now, since our atomic number is in between the values of 40 and 80, This means our N oversee ratio must be equal to 1.50 in order to be considered stable. So let's go ahead and determine our n oversea ratio to answer this question. So plugging in our values, we have An atomic mass of 120 and we're going to subtract our atomic number of 53. Now we're going to divide the total by 53. So when we calculate this out, we end up with An n oversee ratio of 1.26, which is less than 1.50. So this means that our isotope is not stable. Now, I hope that made sense. And let us know if you have any questions