Please write clearly in block capitals.
Centre number Candidate number
Surname
Forename(s)
Candidate signature
I declare this is my own work.
GCSE
COMBINED SCIENCE: TRILOGY
Foundation Tier
F
Chemistry Paper 1F
Monday 19 May 2025 Morning Time allowed: 1 hour 15 minutes
Materials For Examiner’s Use
For this paper you must have:
Question Mark
a ruler
a scientific calculator 1
the periodic table (enclosed). 2
3
Instructions
4
Use black ink or black ball-point pen.
Pencil should only be used for drawing. 5
Fill in the boxes at the top of this page. 6
Answer all questions in the spaces provided. 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 TOTAL
answer(s).
Do all rough work in this book. Cross through any work you do not
want to be marked.
In all calculations, show clearly how you work out your answer.
Information
The maximum mark for this paper is 70.
The marks for questions are shown in brackets.
You are expected to use a calculator where appropriate.
You are reminded of the need for good English and clear presentation in your answers.
IB/M/Jun25/G4007/E9
8464/C/1F
, 2
Do not write
outside the
0 1 This question is about atoms and ions. box
The model of the atom has changed over
time.
0 1 .1 In an early model, scientists thought the atom was a tiny
sphere that could not be divided.
Figure 1 represents this early model of the atom.
Figure 1
The discovery of a subatomic particle led to a change in the model in Figure 1.
Which was the first subatomic particle to be
[1 mark]
discovered? Tick () one box.
Electron
Neutron
Proton
IB/M/Jun25/8464/C/
1F
, 3
Do not write
outside the
0 1 .2 In a later model of the atom, most of the mass was box
concentrated in the centre of the atom.
What is the name of the centre of an atom?
[1 mark]
0 1 .3 Atoms contain three types of subatomic particle.
Draw one line from each subatomic particle to the relative charge of the particle.
[2 marks]
0 1 .4 What is meant by the ‘atomic number of an
[1 mark]
atom’? Tick () one box.
The number of neutrons only
The number of protons only
The number of neutrons + the number of protons
Question 1 continues on the next page
IB/M/Jun25/8464/C/
1F
, 4
Do not write
outside the
Turn over ►
IB/M/Jun25/8464/C/
1F
Centre number Candidate number
Surname
Forename(s)
Candidate signature
I declare this is my own work.
GCSE
COMBINED SCIENCE: TRILOGY
Foundation Tier
F
Chemistry Paper 1F
Monday 19 May 2025 Morning Time allowed: 1 hour 15 minutes
Materials For Examiner’s Use
For this paper you must have:
Question Mark
a ruler
a scientific calculator 1
the periodic table (enclosed). 2
3
Instructions
4
Use black ink or black ball-point pen.
Pencil should only be used for drawing. 5
Fill in the boxes at the top of this page. 6
Answer all questions in the spaces provided. 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 TOTAL
answer(s).
Do all rough work in this book. Cross through any work you do not
want to be marked.
In all calculations, show clearly how you work out your answer.
Information
The maximum mark for this paper is 70.
The marks for questions are shown in brackets.
You are expected to use a calculator where appropriate.
You are reminded of the need for good English and clear presentation in your answers.
IB/M/Jun25/G4007/E9
8464/C/1F
, 2
Do not write
outside the
0 1 This question is about atoms and ions. box
The model of the atom has changed over
time.
0 1 .1 In an early model, scientists thought the atom was a tiny
sphere that could not be divided.
Figure 1 represents this early model of the atom.
Figure 1
The discovery of a subatomic particle led to a change in the model in Figure 1.
Which was the first subatomic particle to be
[1 mark]
discovered? Tick () one box.
Electron
Neutron
Proton
IB/M/Jun25/8464/C/
1F
, 3
Do not write
outside the
0 1 .2 In a later model of the atom, most of the mass was box
concentrated in the centre of the atom.
What is the name of the centre of an atom?
[1 mark]
0 1 .3 Atoms contain three types of subatomic particle.
Draw one line from each subatomic particle to the relative charge of the particle.
[2 marks]
0 1 .4 What is meant by the ‘atomic number of an
[1 mark]
atom’? Tick () one box.
The number of neutrons only
The number of protons only
The number of neutrons + the number of protons
Question 1 continues on the next page
IB/M/Jun25/8464/C/
1F
, 4
Do not write
outside the
Turn over ►
IB/M/Jun25/8464/C/
1F
