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AQA AS-LEVEL PHYSICS 7407/1 PAPER 1 JUNE 2022 QUESTION PAPER

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AQA AS-LEVEL PHYSICS 7407/1 PAPER 1 JUNE 2022 QUESTION PAPER. A sample of bromine gas contains a mixture of two isotopes. An experiment is done to find the percentage of each isotope in this sample. 0 2 . 1 In the experiment, the gas is ionised by a beam of electrons. Explain how the beam of electrons causes a particle of the gas to have a charge of +1e. The gas consists of bromine molecules. Each molecule has two bromine atoms. The experiment finds that the bromine molecules contain 158, 160 or 162 nucleons. Figure 1 shows the percentage of these different molecules in the sample. Bromine has a proton number of 35 The two isotopes in the sample have different nucleon numbers. Calculate the number of neutrons for the isotope that has the greater nucleon number

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AQA AS-LEVEL
PHYSICS PAPER 1 JUNE
2022 QUESTION PAPER

, Please write clearly in block capitals.

Centre number Candidate number


Surname

Forename(s)

Candidate signature
I declare this is my own work.



AS
PHYSICS
Paper 1


Time allowed: 1 hour 30 minutes
Materials
For Examiner’s Use
For this paper you must have:
• a pencil and a ruler Question Mark
• a scientific calculator
1
• a Data and Formulae Booklet
• a protractor. 2
3
Instructions 4
• Use black ink or black ball-point pen.
5
• Fill in the boxes at the top of this page.
• Answer all questions. 6
• You must answer the questions in the spaces provided. Do not write 7
outside the box around each page or on blank pages.
8
• 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). TOTAL
• Do all rough work in this book. Cross through any work you do not want
to be marked.
• Show all your working.

Information
• The marks for questions are shown in brackets.
• The maximum mark for this paper is 70.
• You are expected to use a scientific calculator where appropriate.
• A Data and Formulae Booklet is provided as a loose insert.



*JUN227407101*
IB/M/Jun22/E8 7407/1

, 2
Do not write
outside the
Answer all questions in the spaces provided. box




0 1 A sigma-plus (Σ+) particle and an unidentified particle Y are produced by the strong
interaction between a positive pion (π+) and a proton (p).

This interaction is represented by the equation:

π+ + p → Σ+ + Y

0 1 . 1 Complete Table 1 to show the baryon number B, charge Q and strangeness S for the
particles in this interaction.
[2 marks]

Table 1


π+ p Σ+ Y


B 0


Q +1 +1 +1


S +1



0 1 . 2 Which particle in Table 1 has the quark structure uus?

Tick () one box.
[1 mark]


π+


p


Σ+


Y




*02*
IB/M/Jun22/7407/1

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