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- 1. Fill in the Blank
An isotope is a version of an element with the same number of protons but different number of __________.
- 2. Multiple Choice
Describe the structure of an alpha particle.
a fast-moving electron
2 protons and 2 neutrons
a slow-moving neutron
a hydrogen nucleus
- 3. Multiple Choice
What is the relative charge of an alpha particle?
-1
0
1
2
- 4. Multiple Choice
Select all of the properties of alpha particles.
Highly ionisation
Highly penetrating
Weakly ionising
Weakly penetrating
- 5. Fill in the Blank
An alpha particle can be stopped by _________________.
- 6. Multiple Choice
In alpha decay, the mass number...
increases by 2
decreases by 2
increases by 4
decreases by 4
- 7. Multiple Choice
In alpha decay, the atomic number...
increases by 2
decreases by 2
increases by 4
decreases by 4
- 8. Fill in the Blank
The mass number of Neptunium (Np) is _____.
- 9. Fill in the Blank
The atomic number of Neptunium (Np) is _____.
- 10. Open Ended
Explain how alpha decay is used in smoke detectors.
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