A-level
PHYSICS
Paper 3
Section A
Monday 3 June 2019 Afternoon
Materials
For this paper you must have:
• a pencil and a ruler
• a scientific calculator
• a Data and Formulae Booklet.
Instructions
• Use black
...
A-level
PHYSICS
Paper 3
Section A
Monday 3 June 2019 Afternoon
Materials
For this paper you must have:
• a pencil and a ruler
• a scientific calculator
• a Data and Formulae Booklet.
Instructions
• Use black ink or black ball-point pen.
• Fill in the boxes at the top of this page.
• Answer all questions.
• You must answer the questions in the spaces provided. Do not write
outside the box around each page or on blank pages.
• Do all rough work in this book. Cross through any work you do not want
to be marked.
• If you need extra space for your answer(s), use the lined pages at the
end of this book. Write the question number against your answer(s).
• Show all your working.
Information
• The marks for questions are shown in brackets.
• The maximum mark for this paper is 45.
• You are expected to use a scientific calculator where appropriate.
• A Data and Formulae Booklet is provided as a loose insert.
Section A box
Answer all questions in this section.
0 1 Figure 1 shows a sealed radioactive source used in schools and colleges.
Figure 1
0 1 . 1 State two safety procedures to reduce risk when using this type of source.
[2 marks]
Safety procedure 1
Safety procedure 2
0 1 box . 2 A sealed source contains radium-226 ( 226
88Ra ).
226
88Ra decays by emitting α and β– particles to produce 206
82Pb which is stable.
Figure 2 is a graph of neutron number N against proton number Z, showing the
different ways that 226
88Ra can decay into 206
82Pb .
Points A to M represent all the unstable nuclei that may be formed as 226
88Ra decays
into 206
82Pb .
Figure 2
Determine the number of routes by which B can change into K.
[1 mark]
0 1 . 3 Identify which of the nuclei A to M are common to all the possible ways that 226
88Ra
decays into 206
82Pb .
[3 marks]
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