Lesson Worksheet: Positron Emission Physics
In this worksheet, we will practice solving nuclear equations involving positron emission.
Q1:
The diagram shows nitrogen-13 decaying via positron emission. What isotope is produced in this process?
- ANitrogen-14
- BCarbon-14
- CCarbon-13
- DOxygen-13
- ECarbon-12
Q2:
Knowing that oxygen-15 can undergo positron emission, which of the elements listed in the table does an oxygen-15 nucleus become when it undergoes positron emission?
| Element | Boron | Carbon | Nitrogen | Oxygen | Fluorine | Neon | Sodium |
|---|---|---|---|---|---|---|---|
| Number of Protons | 5 | 6 | 7 | 8 | 9 | 10 | 11 |
- ABoron
- BNitrogen
- COxygen
- DCarbon
- EFluorine
Q3:
The following nuclear equation shows how an isotope of carbon decays to an isotope of boron via positron emission:
What is the value of in the equation?
Q4:
When an atomic nucleus emits a positron, by how much does the mass number of the remaining nucleus change?
Q5:
Which of the following statements correctly describes positron emission?
- AIf an unstable nucleus has too many neutrons, one or more neutrons will be ejected from the nucleus.
- BIf an unstable nucleus has too many nucleons, 2 protons and 2 neutrons may be ejected from the nucleus.
- CIf an unstable nucleus has too few neutrons, a proton may decay into a neutron, releasing a high-energy electron from the nucleus.
- DIf an unstable nucleus has too few neutrons, a proton may decay into a neutron, releasing a high-energy positron from the nucleus.
Q6:
The following nuclear equation shows how an isotope of strontium decays to an isotope of rubidium via positron emission:
What are the values of and in the equation?
- A,
- B,
- C,
- D,
- E,
Q7:
When an atomic nucleus emits a positron, by how much does the atomic number of the remaining nucleus change?
Q8:
Oxygen-13 decays via positron emission to nitrogen-13. Nitrogen-13 decays via positron emission to carbon-13. These statements are shown in the following nuclear equation:
What is the value of in this nuclear equation?
What is the value of in this nuclear equation?
Q9:
The graph shows an isotope of sodium decaying via positron emission.
What isotope of sodium does the graph show?
- ASodium-22
- BSodium-24
- CSodium-21
- DSodium-23
- ESodium-20
What isotope of neon does the graph show?
- ANeon-24
- BNeon-20
- CNeon-23
- DNeon-21
- ENeon-22
Q10:
The following nuclear equation shows how an isotope of magnesium decays to an isotope of sodium via positron emission: What is the value of in the equation?
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