2025-paper1-2025-06-9CH0-01-qp.pdf 2025-paper1-2025-06-9CH0-01-qp.pdf 2025-paper1-2025-06-9CH0-01-qp.pdf
Please check the examination details below before entering your candidate information
Candidate surname Other names
Centre Number Candidate Number
Pearson Edexcel Level 3 GCE
Tuesday 10 June 2025
Paper
Morning (Time: 1 hour 45 minutes)
reference 9CH0/01
Chemistry
Advanced
PAPER 1: Advanced Inorganic and Physical 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).
in the boxes at the top of this page with your name,
centre 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 90.
• –Theusemarks for each question are shown in brackets
this as a guide as to how much time to spend on each question.
• toForstructure
the question marked with an asterisk (*), marks will be awarded for your ability
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
P77832A
©2025 Pearson Education Ltd.
Y:1/1/1/
*P77832A0128*
2025-paper1-2025-06-9CH0-01-qp.pdf 2025-paper1-2025-06-9CH0-01-qp.pdf 2025-paper1-2025-06-9CH0-01-qp
,2025-paper1-2025-06-9CH0-01-qp.pdf 2025-paper1-2025-06-9CH0-01-qp.pdf 2025-paper1-2025-06-9CH0-01-qp.pdf
Answer ALL questions.
Some questions must be answered with a cross in a box . If you change your mind about an
DO NOT WRITE IN THIS AREA
answer, put a line through the box and then mark your new answer with a cross .
1 The table shows data for the three stable isotopes of argon.
Isotope Relative isotopic mass Percentage abundance
36
Ar 35.97 0.337
38
Ar 37.96 0.063
40
Ar 39.96 99.600
(a) State what is meant by the term ‘relative isotopic mass’.
(2)
DO NOT WRITE IN THIS AREA
.. .. .. ... .. . .... ..... .... ..... ... . .. . . .. . .. . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. ... ... ... ... .. ... ... ... ... .. ... ... ... ... ... .. ... ... ... ... .. ... ... ... ... .. ... ... ... ... .. ... ... ... ... ... .. ... ... ... ... .. ... ... ... ... .. ... ... . . .. . .. . .. . .. . .. . . .. . .. . .. . .. . .. . .. .
.. .. .. ... .. . .... ..... .... ..... ... . .. . . .. . .. . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. ... ... ... ... .. ... ... ... ... .. ... ... ... ... ... .. ... ... ... ... .. ... ... ... ... .. ... ... ... ... .. ... ... ... ... ... .. ... ... ... ... .. ... ... ... ... .. ... ... . . .. . .. . .. . .. . .. . . .. . .. . .. . .. . .. . .. .
.. .. .. ... .. . .... ..... .... ..... ... . .. . . .. . .. . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. ... ... ... ... .. ... ... ... ... .. ... ... ... ... ... .. ... ... ... ... .. ... ... ... ... .. ... ... ... ... .. ... ... ... ... ... .. ... ... ... ... .. ... ... ... ... .. ... ... . . .. . .. . .. . .. . .. . . .. . .. . .. . .. . .. . .. .
.. .. .. ... .. . .... ..... .... ..... ... . .. . . .. . .. . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. ... ... ... ... .. ... ... ... ... .. ... ... ... ... ... .. ... ... ... ... .. ... ... ... ... .. ... ... ... ... .. ... ... ... ... ... .. ... ... ... ... .. ... ... ... ... .. ... ... . . .. . .. . .. . .. . .. . . .. . .. . .. . .. . .. . .. .
.. .. .. ... .. . .... ..... .... ..... ... . .. . . .. . .. . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. ... ... ... ... .. ... ... ... ... .. ... ... ... ... ... .. ... ... ... ... .. ... ... ... ... .. ... ... ... ... .. ... ... ... ... ... .. ... ... ... ... .. ... ... ... ... .. ... ... . . .. . .. . .. . .. . .. . . .. . .. . .. . .. . .. . .. .
(b) State what is meant by the term ‘isotope’.
Illustrate your answer by referring to the numbers of sub-atomic particles in these
isotopes of argon.
(2)
.. .. .. ... .. . .... ..... .... ..... ... . .. . . .. . .. . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. ... ... ... ... .. ... ... ... ... .. ... ... ... ... ... .. ... ... ... ... .. ... ... ... ... .. ... ... ... ... .. ... ... ... ... ... .. ... ... ... ... .. ... ... ... ... .. ... ... . . .. . .. . .. . .. . .. . . .. . .. . .. . .. . .. . .. .
.. .. .. ... .. . .... ..... .... ..... ... . .. . . .. . .. . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. ... ... ... ... .. ... ... ... ... .. ... ... ... ... ... .. ... ... ... ... .. ... ... ... ... .. ... ... ... ... .. ... ... ... ... ... .. ... ... ... ... .. ... ... ... ... .. ... ... . . .. . .. . .. . .. . .. . . .. . .. . .. . .. . .. . .. .
DO NOT WRITE IN THIS AREA
.. .. .. ... .. . .... ..... .... ..... ... . .. . . .. . .. . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. ... ... ... ... .. ... ... ... ... .. ... ... ... ... ... .. ... ... ... ... .. ... ... ... ... .. ... ... ... ... .. ... ... ... ... ... .. ... ... ... ... .. ... ... ... ... .. ... ... . . .. . .. . .. . .. . .. . . .. . .. . .. . .. . .. . .. .
.. .. .. ... .. . .... ..... .... ..... ... . .. . . .. . .. . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. ... ... ... ... .. ... ... ... ... .. ... ... ... ... ... .. ... ... ... ... .. ... ... ... ... .. ... ... ... ... .. ... ... ... ... ... .. ... ... ... ... .. ... ... ... ... .. ... ... . . .. . .. . .. . .. . .. . . .. . .. . .. . .. . .. . .. .
.. .. .. ... .. . .... ..... .... ..... ... . .. . . .. . .. . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. ... ... ... ... .. ... ... ... ... .. ... ... ... ... ... .. ... ... ... ... .. ... ... ... ... .. ... ... ... ... .. ... ... ... ... ... .. ... ... ... ... .. ... ... ... ... .. ... ... . . .. . .. . .. . .. . .. . . .. . .. . .. . .. . .. . .. .
.. .. .. ... .. . .... ..... .... ..... ... . .. . . .. . .. . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. ... ... ... ... .. ... ... ... ... .. ... ... ... ... ... .. ... ... ... ... .. ... ... ... ... .. ... ... ... ... .. ... ... ... ... ... .. ... ... ... ... .. ... ... ... ... .. ... ... . . .. . .. . .. . .. . .. . . .. . .. . .. . .. . .. . .. .
2
2025-paper1-2025-06-9CH0-01-qp.pdf *P77832A0228* 2025-paper1-2025-06-9CH0-01-qp.pdf
2025-paper1-2025-06-9CH0-01-qp
, 2025-paper1-2025-06-9CH0-01-qp.pdf 2025-paper1-2025-06-9CH0-01-qp.pdf 2025-paper1-2025-06-9CH0-01-qp.pdf
(c) Calculate the relative atomic mass of argon.
Give your answer to two decimal places.
(2)
DO NOT WRITE IN THIS AREA
DO NOT WRITE IN THIS AREA
(Total for Question 1 = 6 marks)
DO NOT WRITE IN THIS AREA
3
2025-paper1-2025-06-9CH0-01-qp.pdf *P77832A0328*
2025-paper1-2025-06-9CH0-01-qp.pdf Turn over
2025-paper1-2025-06-9CH0-01-qp
Please check the examination details below before entering your candidate information
Candidate surname Other names
Centre Number Candidate Number
Pearson Edexcel Level 3 GCE
Tuesday 10 June 2025
Paper
Morning (Time: 1 hour 45 minutes)
reference 9CH0/01
Chemistry
Advanced
PAPER 1: Advanced Inorganic and Physical 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).
in the boxes at the top of this page with your name,
centre 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 90.
• –Theusemarks for each question are shown in brackets
this as a guide as to how much time to spend on each question.
• toForstructure
the question marked with an asterisk (*), marks will be awarded for your ability
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
P77832A
©2025 Pearson Education Ltd.
Y:1/1/1/
*P77832A0128*
2025-paper1-2025-06-9CH0-01-qp.pdf 2025-paper1-2025-06-9CH0-01-qp.pdf 2025-paper1-2025-06-9CH0-01-qp
,2025-paper1-2025-06-9CH0-01-qp.pdf 2025-paper1-2025-06-9CH0-01-qp.pdf 2025-paper1-2025-06-9CH0-01-qp.pdf
Answer ALL questions.
Some questions must be answered with a cross in a box . If you change your mind about an
DO NOT WRITE IN THIS AREA
answer, put a line through the box and then mark your new answer with a cross .
1 The table shows data for the three stable isotopes of argon.
Isotope Relative isotopic mass Percentage abundance
36
Ar 35.97 0.337
38
Ar 37.96 0.063
40
Ar 39.96 99.600
(a) State what is meant by the term ‘relative isotopic mass’.
(2)
DO NOT WRITE IN THIS AREA
.. .. .. ... .. . .... ..... .... ..... ... . .. . . .. . .. . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. ... ... ... ... .. ... ... ... ... .. ... ... ... ... ... .. ... ... ... ... .. ... ... ... ... .. ... ... ... ... .. ... ... ... ... ... .. ... ... ... ... .. ... ... ... ... .. ... ... . . .. . .. . .. . .. . .. . . .. . .. . .. . .. . .. . .. .
.. .. .. ... .. . .... ..... .... ..... ... . .. . . .. . .. . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. ... ... ... ... .. ... ... ... ... .. ... ... ... ... ... .. ... ... ... ... .. ... ... ... ... .. ... ... ... ... .. ... ... ... ... ... .. ... ... ... ... .. ... ... ... ... .. ... ... . . .. . .. . .. . .. . .. . . .. . .. . .. . .. . .. . .. .
.. .. .. ... .. . .... ..... .... ..... ... . .. . . .. . .. . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. ... ... ... ... .. ... ... ... ... .. ... ... ... ... ... .. ... ... ... ... .. ... ... ... ... .. ... ... ... ... .. ... ... ... ... ... .. ... ... ... ... .. ... ... ... ... .. ... ... . . .. . .. . .. . .. . .. . . .. . .. . .. . .. . .. . .. .
.. .. .. ... .. . .... ..... .... ..... ... . .. . . .. . .. . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. ... ... ... ... .. ... ... ... ... .. ... ... ... ... ... .. ... ... ... ... .. ... ... ... ... .. ... ... ... ... .. ... ... ... ... ... .. ... ... ... ... .. ... ... ... ... .. ... ... . . .. . .. . .. . .. . .. . . .. . .. . .. . .. . .. . .. .
.. .. .. ... .. . .... ..... .... ..... ... . .. . . .. . .. . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. ... ... ... ... .. ... ... ... ... .. ... ... ... ... ... .. ... ... ... ... .. ... ... ... ... .. ... ... ... ... .. ... ... ... ... ... .. ... ... ... ... .. ... ... ... ... .. ... ... . . .. . .. . .. . .. . .. . . .. . .. . .. . .. . .. . .. .
(b) State what is meant by the term ‘isotope’.
Illustrate your answer by referring to the numbers of sub-atomic particles in these
isotopes of argon.
(2)
.. .. .. ... .. . .... ..... .... ..... ... . .. . . .. . .. . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. ... ... ... ... .. ... ... ... ... .. ... ... ... ... ... .. ... ... ... ... .. ... ... ... ... .. ... ... ... ... .. ... ... ... ... ... .. ... ... ... ... .. ... ... ... ... .. ... ... . . .. . .. . .. . .. . .. . . .. . .. . .. . .. . .. . .. .
.. .. .. ... .. . .... ..... .... ..... ... . .. . . .. . .. . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. ... ... ... ... .. ... ... ... ... .. ... ... ... ... ... .. ... ... ... ... .. ... ... ... ... .. ... ... ... ... .. ... ... ... ... ... .. ... ... ... ... .. ... ... ... ... .. ... ... . . .. . .. . .. . .. . .. . . .. . .. . .. . .. . .. . .. .
DO NOT WRITE IN THIS AREA
.. .. .. ... .. . .... ..... .... ..... ... . .. . . .. . .. . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. ... ... ... ... .. ... ... ... ... .. ... ... ... ... ... .. ... ... ... ... .. ... ... ... ... .. ... ... ... ... .. ... ... ... ... ... .. ... ... ... ... .. ... ... ... ... .. ... ... . . .. . .. . .. . .. . .. . . .. . .. . .. . .. . .. . .. .
.. .. .. ... .. . .... ..... .... ..... ... . .. . . .. . .. . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. ... ... ... ... .. ... ... ... ... .. ... ... ... ... ... .. ... ... ... ... .. ... ... ... ... .. ... ... ... ... .. ... ... ... ... ... .. ... ... ... ... .. ... ... ... ... .. ... ... . . .. . .. . .. . .. . .. . . .. . .. . .. . .. . .. . .. .
.. .. .. ... .. . .... ..... .... ..... ... . .. . . .. . .. . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. ... ... ... ... .. ... ... ... ... .. ... ... ... ... ... .. ... ... ... ... .. ... ... ... ... .. ... ... ... ... .. ... ... ... ... ... .. ... ... ... ... .. ... ... ... ... .. ... ... . . .. . .. . .. . .. . .. . . .. . .. . .. . .. . .. . .. .
.. .. .. ... .. . .... ..... .... ..... ... . .. . . .. . .. . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. ... ... ... ... .. ... ... ... ... .. ... ... ... ... ... .. ... ... ... ... .. ... ... ... ... .. ... ... ... ... .. ... ... ... ... ... .. ... ... ... ... .. ... ... ... ... .. ... ... . . .. . .. . .. . .. . .. . . .. . .. . .. . .. . .. . .. .
2
2025-paper1-2025-06-9CH0-01-qp.pdf *P77832A0228* 2025-paper1-2025-06-9CH0-01-qp.pdf
2025-paper1-2025-06-9CH0-01-qp
, 2025-paper1-2025-06-9CH0-01-qp.pdf 2025-paper1-2025-06-9CH0-01-qp.pdf 2025-paper1-2025-06-9CH0-01-qp.pdf
(c) Calculate the relative atomic mass of argon.
Give your answer to two decimal places.
(2)
DO NOT WRITE IN THIS AREA
DO NOT WRITE IN THIS AREA
(Total for Question 1 = 6 marks)
DO NOT WRITE IN THIS AREA
3
2025-paper1-2025-06-9CH0-01-qp.pdf *P77832A0328*
2025-paper1-2025-06-9CH0-01-qp.pdf Turn over
2025-paper1-2025-06-9CH0-01-qp
