Please check the examination details below before entering your candidate information
Candidate surname Other names
Centre Number Candidate Number
Pearson Edexcel International Advanced Level
Wednesday 10 January 2024
Morning (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, ruler
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
P73455A
©2024 Pearson Education Ltd.
S:1/1/1/1/
*P73455A0120*
, SECTION A
Answer ALL the questions in this section.
DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA
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 The first ionisation energies of four successive elements in the Periodic Table
are shown.
Element P Q R S
First ionisation energy / kJ mol−1 1251 1521 419 590
(a) Which element has atoms with a full outer shell of electrons?
A element P
B element Q
C element R
D element S
(b) Which element could be X in a gaseous covalent compound with the formula HX?
A element P
B element Q
C element R
D element S
(c) Which element could be Y in an ionic compound with the formula YF2?
A element P
B element Q
C element R
D element S
(d) Which element has atoms with the largest atomic radius?
A element P
B element Q
C element R
D element S
(Total for Question 1 = 4 marks)
2
*P73455A0220*
, 2 Which diagram represents the electronic structure of a nitrogen atom?
DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA
1s 2s 2p
A ↑↓ ↑ ↑↓ ↑ ↑
B ↑↓ ↑ ↑↓ ↑↓
C ↑↓ ↑↓ ↑ ↑ ↑
D ↑↓ ↑↓ ↑↓ ↑
(Total for Question 2 = 1 mark)
3 Which species does not contain a total of 16 neutrons?
A a molecule of ethene, 12C21H4
B a molecule of oxygen, 16O2
C an atom of silicon, 30Si
D an ion of sulfur, 32S2−
(Total for Question 3 = 1 mark)
4 Each response gives the atomic numbers of two elements.
Which pair of atomic numbers are those of elements that are in different blocks of the
Periodic Table?
A 5, 9
B 10, 16
C 13, 18
D 16, 20
(Total for Question 4 = 1 mark)
5 Which molecule is polar?
A CO2(g)
B CCl4(g)
C BeCl2(g)
D NH3(g)
(Total for Question 5 = 1 mark)
3
*P73455A0320* Turn over
, 6 Which oxide of nitrogen contains 30% nitrogen by mass?
[Ar values: N = 14.0 O = 16.0]
DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA
A NO
B NO2
C N2O
D N2O3
(Total for Question 6 = 1 mark)
7 Calculate the mass of sodium carbonate (Na2CO3) required to make up 250 cm3 of a
0.100 mol dm−3 solution.
[Ar values: C = 12.0 O = 16.0 Na = 23.0]
A 1.30 g
B 2.65 g
C 5.30 g
D 10.6 g
(Total for Question 7 = 1 mark)
8 A block of lead measuring 10 cm × 10 cm × 10 cm contains 3.295 × 1025 atoms.
Calculate the density of lead.
[Ar value: Pb = 207.2 Avogadro constant, L = 6.02 × 1023 mol−1]
A 3.79 g cm−3
B 4.49 g cm−3
C 11.34 g cm−3
D 54.73 g cm−3
(Total for Question 8 = 1 mark)
Use this space for any rough working. Anything you write in this space will gain no credit.
4
*P73455A0420*
Candidate surname Other names
Centre Number Candidate Number
Pearson Edexcel International Advanced Level
Wednesday 10 January 2024
Morning (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, ruler
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
P73455A
©2024 Pearson Education Ltd.
S:1/1/1/1/
*P73455A0120*
, SECTION A
Answer ALL the questions in this section.
DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA
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 The first ionisation energies of four successive elements in the Periodic Table
are shown.
Element P Q R S
First ionisation energy / kJ mol−1 1251 1521 419 590
(a) Which element has atoms with a full outer shell of electrons?
A element P
B element Q
C element R
D element S
(b) Which element could be X in a gaseous covalent compound with the formula HX?
A element P
B element Q
C element R
D element S
(c) Which element could be Y in an ionic compound with the formula YF2?
A element P
B element Q
C element R
D element S
(d) Which element has atoms with the largest atomic radius?
A element P
B element Q
C element R
D element S
(Total for Question 1 = 4 marks)
2
*P73455A0220*
, 2 Which diagram represents the electronic structure of a nitrogen atom?
DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA
1s 2s 2p
A ↑↓ ↑ ↑↓ ↑ ↑
B ↑↓ ↑ ↑↓ ↑↓
C ↑↓ ↑↓ ↑ ↑ ↑
D ↑↓ ↑↓ ↑↓ ↑
(Total for Question 2 = 1 mark)
3 Which species does not contain a total of 16 neutrons?
A a molecule of ethene, 12C21H4
B a molecule of oxygen, 16O2
C an atom of silicon, 30Si
D an ion of sulfur, 32S2−
(Total for Question 3 = 1 mark)
4 Each response gives the atomic numbers of two elements.
Which pair of atomic numbers are those of elements that are in different blocks of the
Periodic Table?
A 5, 9
B 10, 16
C 13, 18
D 16, 20
(Total for Question 4 = 1 mark)
5 Which molecule is polar?
A CO2(g)
B CCl4(g)
C BeCl2(g)
D NH3(g)
(Total for Question 5 = 1 mark)
3
*P73455A0320* Turn over
, 6 Which oxide of nitrogen contains 30% nitrogen by mass?
[Ar values: N = 14.0 O = 16.0]
DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA
A NO
B NO2
C N2O
D N2O3
(Total for Question 6 = 1 mark)
7 Calculate the mass of sodium carbonate (Na2CO3) required to make up 250 cm3 of a
0.100 mol dm−3 solution.
[Ar values: C = 12.0 O = 16.0 Na = 23.0]
A 1.30 g
B 2.65 g
C 5.30 g
D 10.6 g
(Total for Question 7 = 1 mark)
8 A block of lead measuring 10 cm × 10 cm × 10 cm contains 3.295 × 1025 atoms.
Calculate the density of lead.
[Ar value: Pb = 207.2 Avogadro constant, L = 6.02 × 1023 mol−1]
A 3.79 g cm−3
B 4.49 g cm−3
C 11.34 g cm−3
D 54.73 g cm−3
(Total for Question 8 = 1 mark)
Use this space for any rough working. Anything you write in this space will gain no credit.
4
*P73455A0420*
