Isotopes and Radioactivity Quiz

Play an AI-generated podcast conversation about this lesson

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?

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?

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?

Gamma radiation Signup and view all the answers

What defines an unstable atomic nucleus?

Too many or too few neutrons for a given number of protons Signup and view all the answers

How do unstable atoms try to achieve stability?

By emitting excess energy Signup and view all the answers

What is the relationship between the activity of a sample and the number of half-lives that have passed?

The activity decreases exponentially with the number of half-lives. Signup and view all the answers

Which of the following factors is NOT needed to determine the activity present after a certain time in radioactive decay?

Mass of the sample Signup and view all the answers

If a sample has undergone 3 half-lives, what fraction of the original activity remains?

$\frac{1}{8}$ Signup and view all the answers

What will happen to the activity of a sample if it undergoes two more half-lives beyond what was described in the text?

It will be reduced to $\frac{1}{16}$ of its initial activity. Signup and view all the answers

Which type of radiation does not carry enough energy per quantum to ionize atoms or molecules?

Infrared light Signup and view all the answers

Why is radioactive decay considered an exponential process?

Because the rate of decay decreases exponentially over time. Signup and view all the answers

What is the process of removing electrons from neutral atoms called?

Ionization Signup and view all the answers

Which type of radiation can deposit large amounts of energy in a small amount of body tissue?

Alpha particles Signup and view all the answers

What is the range of alpha particles in air?

1-2 inches Signup and view all the answers

Which type of radiation consists of subatomic particles or electromagnetic waves energetic enough to detach electrons from atoms or molecules?

Gamma rays Signup and view all the answers

What is the decay constant (λ) in the equation A(t) = Ao e^(-λt) if A(t) = 2.57 mCi and t = 28 days?

$\frac{0.693}{14.3}$ Signup and view all the answers

Isotopes and Radioactivity Quiz

Podcast Beta

Questions and Answers

What is the term used to describe the time for half the radioactive nuclei in a sample to undergo radioactive decay?

How are unstable atomic nuclei transformed into stable atoms?

What is the main characteristic of radioactive atoms?

Which type of radiation is emitted during radioactive decay?

What defines an unstable atomic nucleus?

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?

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?

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?

Why is radioactive decay considered an exponential process?

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?

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?

What is the decay constant (λ) in the equation A(t) = Ao e^(-λt) if A(t) = 2.57 mCi and t = 28 days?

More Quizzes Like This

Exploring Radioactivity Quiz: Decay, Half-Lives, Nuclear Reactions, an...

Chapter 7: Radioactivity - Isotopes, Ionizing Radiation, Half-life

Radioactivity and Isotopes

Isotopes and Radioactivity Quiz

Upgrade to continue