Curriculum
Course: IB Physics SL
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Curriculum

IB Physics SL

Theme A — Space, Time and Motion

0/80 Dr Dabour Hub Science Diagram and Course Material

Theme B — The Particulate Nature of Matter

0/87 Dr Dabour Hub Science Diagram and Course Material

Theme C — Wave Behaviour

0/60 Dr Dabour Hub Science Diagram and Course Material

Theme D — Fields

0/41 Dr Dabour Hub Science Diagram and Course Material

Theme E — Nuclear and Quantum Physics

0/59 Dr Dabour Hub Science Diagram and Course Material

Tools and Inquiry — IB Physics skills

0/54 Dr Dabour Hub Science Diagram and Course Material
Quiz

E.3.5 Activity and Half-Life – Check yourself

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  • Questions count: 6
  • Passing grade: B+
  • Time limit: 10 minutes
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1.
Which is the SI unit of activity?
Becquerel
Curie
Gray
Sievert
2.
A source has half-life 3 days. What fraction of the original nuclei remains after 9 days?
1/3
1/6
1/8
1/9
3.
The activity of a sample is 2 400 Bq. After 2 half-lives it is...
1 200 Bq
600 Bq
800 Bq
300 Bq
4.
Which graph feature shows half-life?
The slope at t = 0
The y-intercept
The final value
The time for the value to halve
5.
Nuclide X has half-life 10 min and nuclide Y has half-life 20 min. For equal numbers of nuclei, initially...
Y has the greater activity
they have equal activity
X has the greater activity
the activity depends on temperature
6.
After 5 half-lives, roughly what percentage of the radioactive nuclei is left?
50 %
3.1 %
12.5 %
0 %
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Part of Theme E — Nuclear and Quantum Physics — see every lesson and quiz in this unit.
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