A-level 7408/1 ACTUAL
2025 PAPER MERGED WITH
MARK SCHEME
PHYSICS
Paper 1
Please write clearly in block capitals.
Candidate number
Centre number
Surname
Forename(s)
Candidate signature
I declare this is my own work.
A-level
PHYSICS
Paper 1
For Examiner’s Use
Friday 23 May 2025 Morning Time allowed: 2 hours
Question Mark
Materials 1
For this paper you must have: 2
• a pencil and a ruler
• a scientific calculator • a Data and Formulae Booklet • a protractor. 3
4
Instructions
• Use black ink or black ball-point pen. 5
• Fill in the boxes at the top of this page. 6
• Answer all questions.
7
8
9–33
TOTAL
, 2
Do not
write
outside the
box
• You must answer the questions in the spaces provided. Do not write outside 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 this book. Write the
question number against your answer(s).
• 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 85.
• You are expected to use a scientific calculator where appropriate.
• A Data and Formulae Booklet is provided as a loose insert.
*
JUN257408101* tyrionpapers.com 7408/1
IB/M/Jun25/G4006/E14
Section A
Answer all questions in this section.
tyrionpapers.com
IB/M/Jun25/7408/1
, 3
Do not
write
outside the
box
0 1 This question is about an isotope of titanium that only decays by electron capture.
0 1
.1 Complete Figure 1 to show the quark change that occurs during electron capture.
Label the incoming and outgoing particles and the exchange particle.
[3 marks]
Figure 1
0 1 .2 In some circumstances, a nucleus of this isotope can exist with no orbiting electrons.
Explain why a neutral atom of this isotope is less stable than a nucleus that has no
orbiting electrons.
[1 mark]
Turn over ►
tyrionpapers.com
IB/M/Jun25/7408/1
, 4
Do not
write
outside the
box
*02*
tyrionpapers.com
IB/M/Jun25/7408/1
2025 PAPER MERGED WITH
MARK SCHEME
PHYSICS
Paper 1
Please write clearly in block capitals.
Candidate number
Centre number
Surname
Forename(s)
Candidate signature
I declare this is my own work.
A-level
PHYSICS
Paper 1
For Examiner’s Use
Friday 23 May 2025 Morning Time allowed: 2 hours
Question Mark
Materials 1
For this paper you must have: 2
• a pencil and a ruler
• a scientific calculator • a Data and Formulae Booklet • a protractor. 3
4
Instructions
• Use black ink or black ball-point pen. 5
• Fill in the boxes at the top of this page. 6
• Answer all questions.
7
8
9–33
TOTAL
, 2
Do not
write
outside the
box
• You must answer the questions in the spaces provided. Do not write outside 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 this book. Write the
question number against your answer(s).
• 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 85.
• You are expected to use a scientific calculator where appropriate.
• A Data and Formulae Booklet is provided as a loose insert.
*
JUN257408101* tyrionpapers.com 7408/1
IB/M/Jun25/G4006/E14
Section A
Answer all questions in this section.
tyrionpapers.com
IB/M/Jun25/7408/1
, 3
Do not
write
outside the
box
0 1 This question is about an isotope of titanium that only decays by electron capture.
0 1
.1 Complete Figure 1 to show the quark change that occurs during electron capture.
Label the incoming and outgoing particles and the exchange particle.
[3 marks]
Figure 1
0 1 .2 In some circumstances, a nucleus of this isotope can exist with no orbiting electrons.
Explain why a neutral atom of this isotope is less stable than a nucleus that has no
orbiting electrons.
[1 mark]
Turn over ►
tyrionpapers.com
IB/M/Jun25/7408/1
, 4
Do not
write
outside the
box
*02*
tyrionpapers.com
IB/M/Jun25/7408/1
