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Radioactivity

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Question 47

Beta-plus (β+\beta^+β+) particles may be emitted by unstable nuclei.

a.

When an unstable nucleus decays by emitting a β+\beta^+β+ particle, its atomic (proton) number

  • A increases by 1
  • B stays the same
  • C decreases by 1
  • D decreases by 2
[1]
b.

When an unstable nucleus decays by emitting a β+\beta^+β+ particle, its mass (nucleon) number

  • A increases by 1
  • B stays the same
  • C decreases by 1
  • D decreases by 4
[1]
c.

Compared to a β+\beta^+β+ particle, an alpha (α\alphaα) particle

  • A causes less ionisation
  • B has less charge
  • C has greater penetrating power
  • D has a much larger mass
[1]
d.

Describe how a student should measure the corrected count rate of a radioactive alpha source using a Geiger-Müller (GM) detector.

[4]

Radioactivity Questions

  1. IGCSE
  2. /Physics
  3. /Radioactivity