Pearson Edexcel International Advanced Level
WCH11/01
CHEMISTRY
UNIT 1: Structure, Bonding and Introduction to
Organic Chemistry
I
January 2026
Official Question Paper
, lOMoARcPSD|57810709
Please check the examination details below before entering your candidate information
Candidate surname Other names
Centre Number Candidate Number
Pearson Edexcel International Advanced Level
Monday 12 January 2026
Afternoon (Time: 1 hour 30 minutes) Paper
reference WCH11/01
Chemistry
International Advanced Subsidiary/Advanced Level
UNIT 1: Structure, Bonding and Introduction to
Organic Chemistry
You must have: Total Marks
Scientific calculator
Instructions
•• Use black ink or ball-point pen.
If pencil is used for diagrams/sketches/graphs it must be dark (HB or B).
• Fill 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 80.
The marks for each question are shown in brackets
– use this as a guide as to how much time to spend on each question.
• You will be assessed on your ability to organise and present information, ideas,
descriptions and arguments clearly and logically, including your use of grammar,
punctuation and spelling.
• 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.
Try to answer every question.
• Check your answers if you have time at the end. Turn over
, lOMoARcPSD|57810709
SECTION A
Answer ALL the questions in this section.
You should aim to spend no more than 20 minutes on this section.
For each question, select one answer from A to D and put a cross in the box . If you change
your mind, put a line through the box and then mark your new answer with a cross .
1 Which property determines the order of elements in the Periodic Table?
A first ionisation energy
B relative atomic mass
C number of electrons in the outer shell
D number of protons in the nucleus
(Total for Question 1 = 1 mark)
2 Which atom has the most orbitals that contain a single electron?
A C
B Cr
C Mn
D N
(Total for Question 2 = 1 mark)
3 The electronic configuration of element X is 1s2 2s2 2p6 3s2 3p4.
What is the formula of the compound formed when X reacts with potassium?
A KX
B K2X
C K3X
D KX2
(Total for Question 3 = 1 mark)
Use this space for any rough working. Anything you write in this space will gain no credit.
WCH11/01
CHEMISTRY
UNIT 1: Structure, Bonding and Introduction to
Organic Chemistry
I
January 2026
Official Question Paper
, lOMoARcPSD|57810709
Please check the examination details below before entering your candidate information
Candidate surname Other names
Centre Number Candidate Number
Pearson Edexcel International Advanced Level
Monday 12 January 2026
Afternoon (Time: 1 hour 30 minutes) Paper
reference WCH11/01
Chemistry
International Advanced Subsidiary/Advanced Level
UNIT 1: Structure, Bonding and Introduction to
Organic Chemistry
You must have: Total Marks
Scientific calculator
Instructions
•• Use black ink or ball-point pen.
If pencil is used for diagrams/sketches/graphs it must be dark (HB or B).
• Fill 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 80.
The marks for each question are shown in brackets
– use this as a guide as to how much time to spend on each question.
• You will be assessed on your ability to organise and present information, ideas,
descriptions and arguments clearly and logically, including your use of grammar,
punctuation and spelling.
• 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.
Try to answer every question.
• Check your answers if you have time at the end. Turn over
, lOMoARcPSD|57810709
SECTION A
Answer ALL the questions in this section.
You should aim to spend no more than 20 minutes on this section.
For each question, select one answer from A to D and put a cross in the box . If you change
your mind, put a line through the box and then mark your new answer with a cross .
1 Which property determines the order of elements in the Periodic Table?
A first ionisation energy
B relative atomic mass
C number of electrons in the outer shell
D number of protons in the nucleus
(Total for Question 1 = 1 mark)
2 Which atom has the most orbitals that contain a single electron?
A C
B Cr
C Mn
D N
(Total for Question 2 = 1 mark)
3 The electronic configuration of element X is 1s2 2s2 2p6 3s2 3p4.
What is the formula of the compound formed when X reacts with potassium?
A KX
B K2X
C K3X
D KX2
(Total for Question 3 = 1 mark)
Use this space for any rough working. Anything you write in this space will gain no credit.
