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Zone of Stability (Grades 11-12)

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Zone of Stability

1. 
How many nuclides are stable out of 2000 nuclides?
  1. 350
  2. 120
  3. 279
  4. 1000
 
2. 
When a nuclide is considered unstable, what generally occurs as a result?
  1. The nuclide undergoes spontaneous decay.
  2. The nuclide undergoes nonspontaneous decay.
  3. The nuclide undergoes combustion.
  4. The nuclide undergoes decomposition.
3. 
An atomic number of what will likely lead to stability in a nuclide?
  1. 3
  2. 9
  3. 28
  4. 127
 
4. 
Which of the following could represent either the number of protons or neutrons in a stable nuclide?
  1. 8
  2. 21
  3. 27
  4. 51
5. 
Which nuclide would you most likely consider to be stable?
  1. N-14
  2. S-32
  3. He-4
  4. H-2
 
6. 
Which nuclide would you likely consider to be unstable?
  1. Si-30
  2. O-16
  3. He-4
  4. Ca-40
7. 
Above which atomic number does a stable nuclide not exist?
  1. 26
  2. 53
  3. 77
  4. 83
 
8. 
Which of the following will lead to an unstable nuclide forming a new nuclide with the lowest mass?
  1. Beta
  2. Positron
  3. Neutron
  4. Alpha
9. 
Note the ratio of protons to neutrons that will lead to the greatest stability for lighter nuclides.



 
10. 
Note the ratio of neutrons to protons that will lead to stability in heavier nuclides?



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