Problem: Which, of the following isotopes would you expect to be stable? a) uranium-238 b) 4He c) oxygen-16 d) 206Po e) 58Ni

FREE Expert Solution

Recall that the stability of an isotope depends on the ratio of neutrons to protons (N/Z). This means for stable isotopes with:

• Z ≤ 20; the N/Z ratio should be equal to 1.0

• 20 < Z ≤ 40; the N/Z ratio should be equal to 1.25

• 40 < Z ≤ 80; the N/Z ratio should be equal to 1.50

• Z < 83; the stable nuclide does not exist

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Problem Details

Which, of the following isotopes would you expect to be stable? 

a) uranium-238 

b) 4He 

c) oxygen-16 

d) 206Po 

e) 58Ni

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