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Tracing Two Paths to the Same Daughter 4 questions
Tracing Two Paths to the Same Daughter
Base your answers on the information provided and your knowledge of chemistry. Use the 2025 Chemistry Reference Tables as needed.
A museum simulation follows two radioactive parent nuclei. Both records end with a daughter nucleus of lead-210. The model tracks mass number and atomic number for the parent, daughter, and emitted particle.
| Record | Parent mass number | Parent atomic number | Daughter mass number | Daughter atomic number |
|---|---|---|---|---|
| R | 214 | 84 | 210 | 82 |
| S | 210 | 81 | 210 | 82 |
Question 1
Determine the mass number and atomic number of the emitted particle in R. Show how each number follows from the record.
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Question 2
Which emitted particle balances record S in this model?
- A proton
- A neutron
- An alpha particle
- A beta-minus particle
A new simulation event shows the same lead-210 daughter. The summary omits the parent record but displays that the emitted particle has atomic number −1.
Question 3
Use both sources of evidence to select R or S for the new event. Explain why the daughter label by itself could not decide.
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Question 4
Use the periodic table to identify the elements of the two parent nuclei. Include the atomic number of each in your answer.
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