Podcast
Questions and Answers
How is the decay of Carbon-14 represented on the graph?
How is the decay of Carbon-14 represented on the graph?
- As a constant rate of decay
- As an exponential decay curve (correct)
- As a stepwise function
- As a linear function
If a sample has 96.875% daughter atoms, what can be inferred about its age?
If a sample has 96.875% daughter atoms, what can be inferred about its age?
- It is approximately 15,000 years old
- It is less than 10,000 years old
- It is more than 50,000 years old
- It is between 25,000 to 30,000 years old (correct)
What is the significance of the y-axis in the graph of Carbon-14 decay?
What is the significance of the y-axis in the graph of Carbon-14 decay?
- It represents the total number of atoms
- It measures time in years
- It counts the number of half-lives gone by
- It shows the percentage of Carbon-14 atoms remaining (correct)
Which of the following statements about half-lives of Carbon-14 is true?
Which of the following statements about half-lives of Carbon-14 is true?
What result would you expect if only one half-life had passed, based on initial Carbon-14 atoms?
What result would you expect if only one half-life had passed, based on initial Carbon-14 atoms?
Flashcards
Half-life
Half-life
The time it takes for half of the radioactive atoms in a sample to decay.
Carbon-14
Carbon-14
A radioactive isotope of carbon with a half-life of approximately 5,730 years.
Radioactive decay
Radioactive decay
The process where a radioactive atom loses energy and transforms into a different element by emitting radiation.
Parent atom
Parent atom
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Daughter atom
Daughter atom
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Study Notes
Radioactive Decay of Carbon-14
- A rock contains 3.125% parent Carbon-14 atoms and 96.875% daughter atoms.
- To determine the number of half-lives that have passed, find the percentage of original Carbon-14 remaining on the graph.
- The graph shows that 3.125% of the original Carbon-14 remains after 2 half-lives.
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