IB Physics SL E 3 11 Activity Count Rate and Half Life Topic Practice

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Study E.3.11—Activity, count rate and half-life conceptsOpen the corresponding Concept lesson for explanations, examples and exam connections.

Question 1

[Maximum number: 3]

Question (a)

(a)

The isotope tritium (hydrogen-3) has a radioactive half-life of 12 days.

[ 1 ]

Question (i)

(i)

Define radioactive half-life.

[ 1 ]

Question (b)

(b)

A sample of tritium has an activity of 8.0×104 Bq8.0 \times 10^{4} \mathrm{~Bq} at time t=0. The half-life of tritium is 12 days.

[ 2 ]

Question (i)

(i)

Using the axes below, construct a graph to show how the activity of the sample varies with time from t=0 to t=48 days.

Figure for Question (i) — IB Physics SL
[ 2 ]
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