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UNIT 2
MODULE 3: ATOMIC AND NUCLEAR PHYSICS (cont’d)
SPECIFIC OBJECTIVES EXPLANATORY NOTES SUGGESTED PRACTICAL
ACTIVITIES
Radioactivity (cont’d)
Students should be able to:
4.13. discuss uses of radioisotopes The characteristics of an
as tracers for carbon dating isotope which make it
and in radiotherapy; and, suitable for use in
radiotherapy should be
highlighted.
4.14. describe the operation of (For example, G-M tube,
simple detectors. spark counter, cloud
chamber, ratemeter and
scaler). Include explanation
of jet trail in upper
atmosphere.
Suggested Teaching and Learning Activities
To facilitate students’ attainment of the objectives of this Module, teachers are advised to engage
students in teaching and learning activities listed below.
1. Allow students to examine the line spectra of different substances to deduce information
about energy levels.
2. Ask students to measure the absorption effect of different materials of different thickness (on
the three types of radioactive emissions).
3. Allow students to test whether the water loss from a burette or a leaky soft drink bottle is
exponential.
4. Have students perform a radioactive decay simulation using dice or coins.
5. Have students simulate radioactive decay and absorption using photocell and filters.
CXC A16/U2/17 68
