Predicting nuclear stability is important when determining whether or not a nucl
ID: 521357 • Letter: P
Question
Predicting nuclear stability is important when determining whether or not a nuclear reaction can take place spontaneously. Use the following set of guidelines to predict the nuclear stability of the elements listed below. 1. Stable nuclei have a high neutron-to-proton ratio, greater than 1.25 beyond atomic number 40 and continuing to rise at higher atomic numbers. 2. The majority of stable nuclei have even numbers of neutrons and protons, Odd-even and even-odd combinations can be stable but stability is less likely. 3. Nuclei that have the magic numbers of 2, 8, 20, 28, 60, or 82 protons or 2, 8, 20, 28, 50, 82 or 120 neutrons are more stable than nuclei that do not contain these numbers. 4. Nuclei that have atomic numbers greater than 83 are unstable. Nuclei are considered stable if one or more criteria are met. Classify each nucleus as stable or unstable. Drag the appropriate items to their respective bins.Explanation / Answer
89Mo is unstable as it has odd number of neutrons.
212Po is also unstable , it decays by emitting alpha particle , and forming 208Po daughter nuclei.
30P has 15 neutrons so even this is unstable , having half life of approximately 2.5 m. The only stable isotope of phosphorus is 31P
I am unable to see the mass of tin in the question but i guess it is 115 or 118.
115Sn , 118Sn both are stable. Infact tin has most number of stable isotopes.