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Please write clearly in block capitals.
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A-level
CHEMISTRY
Paper 1 Inorganic and Physical Chemistry
Monday 10 June 2024 Morning Time allowed: 2 hours
Materials
For this paper you must have: For Examiner’s Use
the Periodic Table/Data Booklet, provided as an insert (enclosed)
a ruler with millimetre measurements Question Mark
a scientific calculator, which you are expected to use where appropriate. 1
2
Instructions
3
Use black ink or black ball-point pen.
Fill in the boxes at the top of this page. 4
Answer all questions. 5
You must answer the questions in the spaces provided. Do not write outside
6
the box around each page or on blank pages.
If you need extra space for your answer(s), use the lined pages at the end of 7
this book. Write the question number against your answer(s). 8
All working must be shown. 9
Do all rough work in this book. Cross through any work you do not
want to be marked. TOTAL
Information
The marks for questions are shown in brackets.
The maximum mark for this paper is 105.
IB/M/Jun24/G4006/E9 7405/1
, 2
Do not write
outside the
Answer all questions in the spaces provided. box
0 1 This question is about atomic structure.
0 1 . 1 In 1897 JJ Thomson discovered the electron. He suggested that atoms were
positively charged spheres with electrons embedded within them.
Figure 1 represents an atom using Thomson’s model.
Figure 1
Suggest the identity of this atom.
Give two differences between the modern model of an atom and the Thomson model
of an atom.
[3 marks]
Identity
Difference 1
Difference 2
IB/M/Jun24/7405/1
, 3
Do not write
outside the
0 1 . 2 Tellurium has a relative atomic mass of 127.6 box
Iodine has a relative atomic mass of 126.9
Define relative atomic mass.
Suggest one property of tellurium that justifies its position before iodine in the
modern Periodic Table.
[3 marks]
Definition
Justification
0 1 . 3 A sample of tellurium is analysed in a time of flight (TOF) mass spectrometer using
electron impact ionisation.
Give an equation, including state symbols, for this ionisation.
[1 mark]
Question 1 continues on the next page
Turn over ►
IB/M/Jun24/7405/1
, 4
Do not write
outside the
0 1 . 4 In the TOF mass spectrometer an ion of an isotope of tellurium, with mass number y, box
travels along a 1.25 m flight tube with a kinetic energy of 1.88 x 10–12 J
The ion takes 3.00 x 10–7 s to reach the detector.
KE = 1 mv2
2
KE = kinetic energy / J
m = mass / kg
v = speed / m s–1
Calculate the mass, in g, of 1 mole of these tellurium ions.
Use your answer to suggest the mass number y of the tellurium isotope.
The Avogadro constant, L = 6.022 × 1023 mol–1
[5 marks]
Mass g
Mass number y
IB/M/Jun24/7405/1
Please write clearly in block capitals.
Centre number Candidate number
Surname
Forename(s)
Candidate signature
I declare this is my own work.
A-level
CHEMISTRY
Paper 1 Inorganic and Physical Chemistry
Monday 10 June 2024 Morning Time allowed: 2 hours
Materials
For this paper you must have: For Examiner’s Use
the Periodic Table/Data Booklet, provided as an insert (enclosed)
a ruler with millimetre measurements Question Mark
a scientific calculator, which you are expected to use where appropriate. 1
2
Instructions
3
Use black ink or black ball-point pen.
Fill in the boxes at the top of this page. 4
Answer all questions. 5
You must answer the questions in the spaces provided. Do not write outside
6
the box around each page or on blank pages.
If you need extra space for your answer(s), use the lined pages at the end of 7
this book. Write the question number against your answer(s). 8
All working must be shown. 9
Do all rough work in this book. Cross through any work you do not
want to be marked. TOTAL
Information
The marks for questions are shown in brackets.
The maximum mark for this paper is 105.
IB/M/Jun24/G4006/E9 7405/1
, 2
Do not write
outside the
Answer all questions in the spaces provided. box
0 1 This question is about atomic structure.
0 1 . 1 In 1897 JJ Thomson discovered the electron. He suggested that atoms were
positively charged spheres with electrons embedded within them.
Figure 1 represents an atom using Thomson’s model.
Figure 1
Suggest the identity of this atom.
Give two differences between the modern model of an atom and the Thomson model
of an atom.
[3 marks]
Identity
Difference 1
Difference 2
IB/M/Jun24/7405/1
, 3
Do not write
outside the
0 1 . 2 Tellurium has a relative atomic mass of 127.6 box
Iodine has a relative atomic mass of 126.9
Define relative atomic mass.
Suggest one property of tellurium that justifies its position before iodine in the
modern Periodic Table.
[3 marks]
Definition
Justification
0 1 . 3 A sample of tellurium is analysed in a time of flight (TOF) mass spectrometer using
electron impact ionisation.
Give an equation, including state symbols, for this ionisation.
[1 mark]
Question 1 continues on the next page
Turn over ►
IB/M/Jun24/7405/1
, 4
Do not write
outside the
0 1 . 4 In the TOF mass spectrometer an ion of an isotope of tellurium, with mass number y, box
travels along a 1.25 m flight tube with a kinetic energy of 1.88 x 10–12 J
The ion takes 3.00 x 10–7 s to reach the detector.
KE = 1 mv2
2
KE = kinetic energy / J
m = mass / kg
v = speed / m s–1
Calculate the mass, in g, of 1 mole of these tellurium ions.
Use your answer to suggest the mass number y of the tellurium isotope.
The Avogadro constant, L = 6.022 × 1023 mol–1
[5 marks]
Mass g
Mass number y
IB/M/Jun24/7405/1
