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.3.1 Isotopes and Radioactive Decay – Check yourself

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  • Questions count: 6
  • Passing grade: B+
  • Time limit: 10 minutes
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1.
Two isotopes of the same element differ in their...
number of neutrons
number of protons
number of electrons in the neutral atom
chemical properties greatly
2.
How many neutrons are in the nuclide carbon-14, 146C?
6
14
8
20
3.
Which statement shows that radioactive decay is spontaneous?
The count rate varies about a mean
Heating the source does not change its decay rate
The activity falls exponentially
Gamma rays are not deflected by magnetic fields
4.
A source records a mean of 900 counts in an interval. The typical random fluctuation is about...
3
90
900
30
5.
Why do heavy stable nuclei have more neutrons than protons?
Neutrons are lighter than protons
Neutrons repel each other
Neutrons add strong-force attraction without adding electrostatic repulsion
Protons attract each other electrostatically
6.
A graph of undecayed nuclei against time looks like a jagged staircase rather than a smooth curve. This is most likely because...
the source is very active
there are only a few nuclei so randomness is visible
the half-life is long
the detector is faulty
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Part of Theme E — Nuclear and Quantum Physics — see every lesson and quiz in this unit.
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