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6 Radioactivity

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Question 142
F

Americium-241 is used in some smoke alarms. It decays by emitting alpha particles.

The equation for this decay is

95241Am→93ANp+24α {}^{241}_{95}\mathrm{Am} \rightarrow {}^{A}_{93}\mathrm{Np} + {}^{4}_{2}\alpha 95241​Am→93A​Np+24​α
a.

State what an alpha particle is.

[1]
b.

Determine the value of AAA.

[1]
c.

Explain how the equation shows that charge is conserved in this decay.

[2]
d.

The neptunium nucleus is formed with extra energy. It then emits gamma radiation.

Describe what happens to the neptunium nucleus when it emits gamma radiation.

[2]
Markscheme

6 Radioactivity Questions

  1. GCSE
  2. /Physics
  3. /6 Radioactivity

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