EXAM PLUG
Genuine Past Papers • Real Exam Conditions
Ace Your 2027 Mocks
Practice with the real thing — and walk in ready.
Hit your target grade.
U G
L
Get the university offer you're working for.
P
M
This is a full, genuine past paper — not a summary, not a shortcut.
Sit it like the real exam, mark it honestly, and use every mistake
A
as a sign of exactly what to revise next.
EX
EXAM PLUG • 2026 Exam Papers Collection
, Why Past Papers Work
Practise under real exam conditions
Time yourself. Sit it in silence. The mocks will feel familiar— and familiar feels calm.
Learn the exact question style
Examiners repeat patterns. The more real papers you sit, the faster you'll spot what's coming.
G
Find your weak topics early
Every mark you drop here is a mark you can fix before it counts on results day.
Build real exam stamina
L
Concentration is a skill. Full papers train it — short notes don't.
U
P
AM
E X Every paper you complete
gets you one step closer to your university place.
Keep going. Future you is counting on it.
EXAM PLUG • 2026 Exam Papers Collection
, How To Use This Paper
1 Clear your space
Phone away, timer ready, exam-board formula sheet only if you're allowed one in the real thing.
2 Time it properly
Use the real exam duration. Running over the clock hides the truth about your pace.
3 Sit it in one go
G
No pausing to check notes. Treat every question like it's results day.
4 Mark it honestly
U
Use the mark scheme line by line — partial credit included. Don't round up in your favour.
L
P
5 Review, don't just check
For every mark lost, write one sentence on why. That sentence is your next revision session.
AM
E X
Struggling with a topic? Come back to this paper in a week.
Repetition is what turns 'nearly' into 'nailed it.'
EXAM PLUG • 2026 Exam Papers Collection
, 5 Quick Revision Wins
1 Little and often beats last-minute
20 focused minutes a day adds up to more than one panicked all-nighter.
2 Test yourself, don't just re-read
Past papers, flashcards, blurting — anything that makes you retrieve, not recognise.
3 Chase your weakest topic first
4 Explain it out loud
U G
It's tempting to revise what you're already good at. Don't. Go where the marks are missing.
L
If you can teach a topic to someone else in plain English, you actually know it.
P
5 Protect your sleep before the mock
A tired brain forgets more in the exam than it ever learned the night before.
AM
E X
Your target grade isn't luck. It's reps.
This paper is one more rep. Make it count.
EXAM PLUG • 2026 Exam Papers Collection
, You've Got This.
Whether you're aiming for the top grades or just want to walk into
your 2027 mocks feeling prepared, consistent practice with real
papers is the fastest way to get there.
Set a timer. Sit this paper properly. Mark it without excuses.
Then go again — that's how grades move.
TARGET GRADE. TARGET UNIVERSITY. TARGET FUTURE.
U G
P L
Good luck in your 2027 mocks — make every mark count.
— The Exam Plug Team
AM
E X
EXAM PLUG • 2026 Exam Papers Collection
, Please check the examination details below before entering your candidate information
Candidate surname Other names
Centre Number Candidate Number
Pearson Edexcel Level 3 GCE
Monday 15 June 2026
Morning (Time: 2 hours 30 minutes) Paper
reference 9CH0/03
Chemistry
Advanced
PAPER 3: General and Practical Principles in Chemistry
You must have: Total Marks
Scientific calculator, Data Booklet, ruler
Instructions
• Use black ink or ball‑point pen.
• IfFillpencil is used for diagrams/sketches/graphs it must be dark (HB or B).
• centrein the boxes at the top of this page with your name,
number and candidate number.
• Answer all questions.
• Answer the questions in the spaces provided
– there may be more space than you need.
Information
• The total mark for this paper is 120.
• The marks for each question are shown in brackets
– use this as a guide as to how much time to spend on each question.
• For the question marked with an asterisk (*), marks will be awarded for your
ability to structure your answer logically, showing how the points that you make
are related or follow on from each other where appropriate.
• A Periodic Table is printed on the back cover of this paper.
Advice
• Read each question carefully before you start to answer it.
• Show all your working in calculations and include units where appropriate.
• your answers if you have time at the end.
Check
Turn over
P83918A
©2026 Pearson Education Ltd.
P:1/1/1/1/1/1/1/1/
*P83918A0136*
, Answer ALL questions.
Write your answers in the spaces provided.
DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA
1 This question is about isotopes.
(a) Explain why isotopes of the same element are distinguished by
mass number and not by atomic number.
Refer to sub‑atomic particles in your answer.
(2)
. . . . . . . . . . . . .. .. .. .. .. .. .. .. .. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ........................................................................................................................................................... . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . .. .. .. .. .. .. .. .. .. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ........................................................................................................................................................... . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . .. .. .. .. .. .. .. .. .. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ........................................................................................................................................................... . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . .. .. .. .. .. .. .. .. .. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ........................................................................................................................................................... . . . . . . . . . . . . . . . . . . . .
(b) Twenty isotopes of neon are known.
One sample of neon contained three stable isotopes of neon with the percentage
abundances shown.
Isotope Relative isotopic mass Percentage abundance
20
Ne 19.99 90.48
21
Ne 20.99 0.27
22
Ne 21.99 9.25
Calculate the relative atomic mass of neon in this sample.
Give your answer to two decimal places.
(2)
2
*P83918A0236*
, (c) State why isotopes of an element have the same chemical properties.
(2)
DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA
. . . . . . . . . . . .. .. .. .. .. .. .. .. .. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ............................................................................................................................................ ................ . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . .. .. .. .. .. .. .. .. .. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ............................................................................................................................................ ................ . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . .. .. .. .. .. .. .. .. .. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ............................................................................................................................................ ................ . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . .. .. .. .. .. .. .. .. .. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ............................................................................................................................................ ................ . . . . . . . . . . . . . . . . . . . .
(Total for Question 1 = 6 marks)
3
*P83918A0336* Turn over
Genuine Past Papers • Real Exam Conditions
Ace Your 2027 Mocks
Practice with the real thing — and walk in ready.
Hit your target grade.
U G
L
Get the university offer you're working for.
P
M
This is a full, genuine past paper — not a summary, not a shortcut.
Sit it like the real exam, mark it honestly, and use every mistake
A
as a sign of exactly what to revise next.
EX
EXAM PLUG • 2026 Exam Papers Collection
, Why Past Papers Work
Practise under real exam conditions
Time yourself. Sit it in silence. The mocks will feel familiar— and familiar feels calm.
Learn the exact question style
Examiners repeat patterns. The more real papers you sit, the faster you'll spot what's coming.
G
Find your weak topics early
Every mark you drop here is a mark you can fix before it counts on results day.
Build real exam stamina
L
Concentration is a skill. Full papers train it — short notes don't.
U
P
AM
E X Every paper you complete
gets you one step closer to your university place.
Keep going. Future you is counting on it.
EXAM PLUG • 2026 Exam Papers Collection
, How To Use This Paper
1 Clear your space
Phone away, timer ready, exam-board formula sheet only if you're allowed one in the real thing.
2 Time it properly
Use the real exam duration. Running over the clock hides the truth about your pace.
3 Sit it in one go
G
No pausing to check notes. Treat every question like it's results day.
4 Mark it honestly
U
Use the mark scheme line by line — partial credit included. Don't round up in your favour.
L
P
5 Review, don't just check
For every mark lost, write one sentence on why. That sentence is your next revision session.
AM
E X
Struggling with a topic? Come back to this paper in a week.
Repetition is what turns 'nearly' into 'nailed it.'
EXAM PLUG • 2026 Exam Papers Collection
, 5 Quick Revision Wins
1 Little and often beats last-minute
20 focused minutes a day adds up to more than one panicked all-nighter.
2 Test yourself, don't just re-read
Past papers, flashcards, blurting — anything that makes you retrieve, not recognise.
3 Chase your weakest topic first
4 Explain it out loud
U G
It's tempting to revise what you're already good at. Don't. Go where the marks are missing.
L
If you can teach a topic to someone else in plain English, you actually know it.
P
5 Protect your sleep before the mock
A tired brain forgets more in the exam than it ever learned the night before.
AM
E X
Your target grade isn't luck. It's reps.
This paper is one more rep. Make it count.
EXAM PLUG • 2026 Exam Papers Collection
, You've Got This.
Whether you're aiming for the top grades or just want to walk into
your 2027 mocks feeling prepared, consistent practice with real
papers is the fastest way to get there.
Set a timer. Sit this paper properly. Mark it without excuses.
Then go again — that's how grades move.
TARGET GRADE. TARGET UNIVERSITY. TARGET FUTURE.
U G
P L
Good luck in your 2027 mocks — make every mark count.
— The Exam Plug Team
AM
E X
EXAM PLUG • 2026 Exam Papers Collection
, Please check the examination details below before entering your candidate information
Candidate surname Other names
Centre Number Candidate Number
Pearson Edexcel Level 3 GCE
Monday 15 June 2026
Morning (Time: 2 hours 30 minutes) Paper
reference 9CH0/03
Chemistry
Advanced
PAPER 3: General and Practical Principles in Chemistry
You must have: Total Marks
Scientific calculator, Data Booklet, ruler
Instructions
• Use black ink or ball‑point pen.
• IfFillpencil is used for diagrams/sketches/graphs it must be dark (HB or B).
• centrein the boxes at the top of this page with your name,
number and candidate number.
• Answer all questions.
• Answer the questions in the spaces provided
– there may be more space than you need.
Information
• The total mark for this paper is 120.
• The marks for each question are shown in brackets
– use this as a guide as to how much time to spend on each question.
• For the question marked with an asterisk (*), marks will be awarded for your
ability to structure your answer logically, showing how the points that you make
are related or follow on from each other where appropriate.
• A Periodic Table is printed on the back cover of this paper.
Advice
• Read each question carefully before you start to answer it.
• Show all your working in calculations and include units where appropriate.
• your answers if you have time at the end.
Check
Turn over
P83918A
©2026 Pearson Education Ltd.
P:1/1/1/1/1/1/1/1/
*P83918A0136*
, Answer ALL questions.
Write your answers in the spaces provided.
DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA
1 This question is about isotopes.
(a) Explain why isotopes of the same element are distinguished by
mass number and not by atomic number.
Refer to sub‑atomic particles in your answer.
(2)
. . . . . . . . . . . . .. .. .. .. .. .. .. .. .. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ........................................................................................................................................................... . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . .. .. .. .. .. .. .. .. .. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ........................................................................................................................................................... . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . .. .. .. .. .. .. .. .. .. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ........................................................................................................................................................... . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . .. .. .. .. .. .. .. .. .. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ........................................................................................................................................................... . . . . . . . . . . . . . . . . . . . .
(b) Twenty isotopes of neon are known.
One sample of neon contained three stable isotopes of neon with the percentage
abundances shown.
Isotope Relative isotopic mass Percentage abundance
20
Ne 19.99 90.48
21
Ne 20.99 0.27
22
Ne 21.99 9.25
Calculate the relative atomic mass of neon in this sample.
Give your answer to two decimal places.
(2)
2
*P83918A0236*
, (c) State why isotopes of an element have the same chemical properties.
(2)
DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA
. . . . . . . . . . . .. .. .. .. .. .. .. .. .. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ............................................................................................................................................ ................ . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . .. .. .. .. .. .. .. .. .. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ............................................................................................................................................ ................ . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . .. .. .. .. .. .. .. .. .. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ............................................................................................................................................ ................ . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . .. .. .. .. .. .. .. .. .. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ............................................................................................................................................ ................ . . . . . . . . . . . . . . . . . . . .
(Total for Question 1 = 6 marks)
3
*P83918A0336* Turn over
