Lesson 4.4.2.1
4.4.2.1 Radioactive decay and nuclear radiation Quiz: AQA Physics, Unit 4
20 questions
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Lesson 4.4.2.1, Radioactive decay and nuclear radiation: 20 multiple choice questions for the AQA GCSE Physics (8463), Unit 4: Atomic structure, written with Revision Ninja.
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The 20 questions
-
What type of process is radioactive decay?
- Controlled
- Deterministic
- Random
- Predictable
-
Activity is measured in:
- Becquerel, Bq
- Newton, N
- Sievert, Sv
- Pascal, Pa
-
What is the definition of radioactive activity?
- Particle speed
- Half-life
- Decay rate
- Total energy
-
What is measured as the count-rate by a detector?
- Total mass lost
- Energy emitted
- Decays per second
- Velocity of particles
-
What is the composition of an alpha particle?
- High speed electron
- Electromagnetic wave
- Single neutron
- Helium nucleus
-
What is a beta particle?
- High-speed electron
- Helium nucleus
- Electromagnetic wave
- Neutron stream
-
What are gamma rays?
- Neutron beams
- Fast electrons
- Alpha particles
- Electromagnetic radiation
-
Which of these is a type of nuclear radiation emitted by unstable nuclei?
- A neutron
- An electron cloud
- A proton
- A hydrogen atom
-
What is a required property of nuclear radiation at GCSE?
- Decay constant
- Half-life
- Mass number
- Penetrating power
-
Which radiation is the least penetrating of the three?
- Beta particle
- Alpha particle
- Electromagnetic wave
- Gamma ray
-
Which radiation has the greatest ionising power?
- Electromagnetic wave
- Beta particle
- Gamma ray
- Alpha particle
-
Which radiation can be stopped by a sheet of paper?
- Neutron
- Beta particle
- Alpha particle
- Gamma ray
-
What are gamma rays emitted from?
- The nucleus
- Inner shells
- Outer electrons
- Free orbitals
-
A radioactive source emits 300 decays in one minute. What is its activity?
- 5 Bq
- 300 Bq
- 60 Bq
- 18 000 Bq
-
A detector records 40 counts in 4 seconds. What is the count-rate?
- 10 counts per second
- 44 counts per second
- 160 counts per second
- 4 counts per second
-
Why is radioactive decay classified as a random process?
- Equal half-lives
- Fixed count-rate
- Unpredictable decay timing
- Constant activity
-
What must students do when evaluating a radioactive source?
- Choose the best source
- Predict random decays
- Calculate mass defects
- Measure exact half-lives
-
What happens to an unstable nucleus when it gives out radiation?
- It becomes more stable
- It stops all decay
- It gains more mass
- It splits instantly
-
Which set of properties best matches a beta particle?
- Very low penetration
- Moderate penetration
- Stopped by paper
- Zero ionising power
-
A beta particle is emitted from a nucleus. What charge does it carry?
- Positive
- Variable
- Negative
- Neutral
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