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5.2 Radioactivity

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Question 3

The table below shows the ability of three different types of radiation, PPP, QQQ, and RRR, to penetrate various materials:

RadiationPenetrates paper?Penetrates 5 mm of aluminium?Penetrates 50 mm of lead?PYesNoNoQNoNoNoRYesYesNo \begin{array}{|c|c|c|c|} \hline \text{Radiation} & \text{Penetrates paper?} & \text{Penetrates } 5\text{ mm of aluminium?} & \text{Penetrates } 50\text{ mm of lead?} \\ \hline P & \text{Yes} & \text{No} & \text{No} \\ \hline Q & \text{No} & \text{No} & \text{No} \\ \hline R & \text{Yes} & \text{Yes} & \text{No} \\ \hline \end{array} RadiationPQR​Penetrates paper?YesNoYes​Penetrates 5 mm of aluminium?NoNoYes​Penetrates 50 mm of lead?NoNoNo​​

Which row correctly identifies PPP, QQQ, and RRR?

A

PPP: α\alphaα-particles, QQQ: β\betaβ-particles, RRR: γ\gammaγ-rays

B

PPP: β\betaβ-particles, QQQ: α\alphaα-particles, RRR: γ\gammaγ-rays

C

PPP: β\betaβ-particles, QQQ: γ\gammaγ-rays, RRR: α\alphaα-particles

D

PPP: γ\gammaγ-rays, QQQ: α\alphaα-particles, RRR: β\betaβ-particles

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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