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5.2 Radioactivity

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Question 47
a.

An α\alphaα-particle may be represented by the symbol 24He{}_{2}^{4}\text{He}24​He.

What does the He\text{He}He indicate about an α\alphaα-particle?

[1]
b.

What does the 444 indicate about an α\alphaα-particle?

[1]
c.

What does the 222 indicate about an α\alphaα-particle?

[1]
d.

The nuclide 92238U{}_{92}^{238}\text{U}92238​U decays by emitting an α\alphaα-particle.

Complete the nuclear equation for this decay by finding the missing numbers AAA and ZZZ:

92238U⟶ZATh+24He {}_{92}^{238}\text{U} \longrightarrow {}_{Z}^{A}\text{Th} + {}_{2}^{4}\text{He} 92238​U⟶ZA​Th+24​He
[2]
Markscheme

5.2 Radioactivity Questions

  1. IGCSE
  2. /Physics
  3. /5.2 Radioactivity

484 exam-style questions on CIE IGCSE Physics 5.2 Radioactivity, covering 5.2.1 Background radiation and measuring count rate, 5.2.2a Alpha, beta and gamma emission, 5.2.2b Deflection and ionising effects of nuclear radiation, 5.2.3a Radioactive decay, 5.2.3b Effects of decay on the nucleus and decay equations, 5.2.4a Half-life, 5.2.4b Choosing isotopes for applications, and 5.2.5 Effects of ionising radiation and safety precautions. Each one has a worked solution and a mark scheme showing where the marks go.

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