Radioactivity – Worksheet


Worksheet to accompany the lesson Radioactivity.

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radioactivity worksheet


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Worksheet Contents

  • This worksheet covers:
  • Unstable nuclei and radioisotopes
  • Nuclear decay
  • Alpha decay and alpha particles
  • Beta decay and beta particles
  • Gamma decay and gamma rays
  • Half life
  • Penetrating power
  • Radiation dose
  • Natural and man-made sources of radiation
  • Includes:
  • Unit outline.
  • Cloze activity (fill in the blanks).
  • Short-answer questions.
  • Extension questions.
  • Topics for further research.
  • Teacher version containing complete answers.
  • Aligned to the Australian Year 9 Science curriculum.
  • 8 pages.

Learning Outcomes

  • By the end of this worksheet students will be able to:
  • ☑   Explain why some isotopes undergo spontaneous nuclear decay.
  • ☑   Describe alpha, beta and gamma decay.
  • ☑   Predict the products of alpha, beta and gamma decay.
  • ☑   Define transmutation and explain how it occurs.
  • ☑   Define half life and perform half life calculations.
  • ☑   Compare the penetrating power of alpha, beta and gamma radiation.
  • ☑   Define radiation dose and give examples of natural and artificial sources of radiation.


This resource is also included in the Year 9 Chemistry PDF Workbook.


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