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Questions and Answers
What is the term used to describe the time for half the radioactive nuclei in a sample to undergo radioactive decay?
What is the term used to describe the time for half the radioactive nuclei in a sample to undergo radioactive decay?
- Radiation decay period
- Isotopic stability time
- Radioactive half-life (correct)
- Nuclear transformation time
How are unstable atomic nuclei transformed into stable atoms?
How are unstable atomic nuclei transformed into stable atoms?
- By emitting non-ionizing rays
- By emitting ionizing particles (correct)
- Through radioactive half-life
- Through nuclear fusion
What is the main characteristic of radioactive atoms?
What is the main characteristic of radioactive atoms?
- They have a shorter half-life
- They give off excess energy (correct)
- They lack protons
- They are chemically unstable
Which type of radiation is emitted during radioactive decay?
Which type of radiation is emitted during radioactive decay?
What defines an unstable atomic nucleus?
What defines an unstable atomic nucleus?
How do unstable atoms try to achieve stability?
How do unstable atoms try to achieve stability?
What is the relationship between the activity of a sample and the number of half-lives that have passed?
What is the relationship between the activity of a sample and the number of half-lives that have passed?
Which of the following factors is NOT needed to determine the activity present after a certain time in radioactive decay?
Which of the following factors is NOT needed to determine the activity present after a certain time in radioactive decay?
If a sample has undergone 3 half-lives, what fraction of the original activity remains?
If a sample has undergone 3 half-lives, what fraction of the original activity remains?
What will happen to the activity of a sample if it undergoes two more half-lives beyond what was described in the text?
What will happen to the activity of a sample if it undergoes two more half-lives beyond what was described in the text?
Which type of radiation does not carry enough energy per quantum to ionize atoms or molecules?
Which type of radiation does not carry enough energy per quantum to ionize atoms or molecules?
Why is radioactive decay considered an exponential process?
Why is radioactive decay considered an exponential process?
What is the process of removing electrons from neutral atoms called?
What is the process of removing electrons from neutral atoms called?
Which type of radiation can deposit large amounts of energy in a small amount of body tissue?
Which type of radiation can deposit large amounts of energy in a small amount of body tissue?
What is the range of alpha particles in air?
What is the range of alpha particles in air?
Which type of radiation consists of subatomic particles or electromagnetic waves energetic enough to detach electrons from atoms or molecules?
Which type of radiation consists of subatomic particles or electromagnetic waves energetic enough to detach electrons from atoms or molecules?
What is the decay constant (λ) in the equation A(t) = Ao e^(-λt) if A(t) = 2.57 mCi and t = 28 days?
What is the decay constant (λ) in the equation A(t) = Ao e^(-λt) if A(t) = 2.57 mCi and t = 28 days?
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