Please write clearly in block capitals.
Centre number Candidate
number
Surname
Forename(s)
Candidatee
signatur
I declare this is my own work.
A-
level
CHEMTR
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 6
write outside the box around each page or on blank pages.
7
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 8
answer(s). 9
All working must be shown.
TOTAL
Do all rough work in this book. Cross through any work
you do not want to be marked.
Information
The marks for questions are shown in brackets.
The maximum mark for this paper is 105.
7405/1
, 2
Do not write
outside the
Answer all questions in the spaces box
provided.
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 box
127.6 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
box
IB/M/
Jun24/7405/1
Centre number Candidate
number
Surname
Forename(s)
Candidatee
signatur
I declare this is my own work.
A-
level
CHEMTR
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 6
write outside the box around each page or on blank pages.
7
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 8
answer(s). 9
All working must be shown.
TOTAL
Do all rough work in this book. Cross through any work
you do not want to be marked.
Information
The marks for questions are shown in brackets.
The maximum mark for this paper is 105.
7405/1
, 2
Do not write
outside the
Answer all questions in the spaces box
provided.
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 box
127.6 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
box
IB/M/
Jun24/7405/1
