Please write clearly in block capitals.
Centre number Candidate number
Surname
Forename(s)
Candidate signature
I declare this is my own work.
A-level
CHEMISTRY
Paper 1 Inorganic and Physical Chemistry
Tuesday 2 June 2026 Morning Time allowed: 2 hours
Materials
For Examiner’s Use
For this paper you must have:
• the Periodic Table/Data Booklet, provided as an insert (enclosed) Question Mark
• a ruler with millimetre measurements 1
• a scientific calculator, which you are expected to use where appropriate.
2
Instructions 3
• Use black ink or black ball-point pen. 4
• Fill in the boxes at the top of this page. 5
• Answer all questions.
• You must answer the questions in the spaces provided. Do not write outside 6
the box around each page or on blank pages. 7
• If you need extra space for your answer(s), use the lined pages at the end of 8
this book. Write the question number against your answer(s).
• All working must be shown. TOTAL
• Do all rough work in this book. Cross through any work you do not
want to be marked.
Information
• The marks for questions are shown in brackets.
• The maximum mark for this paper is 105.
*Jun *
IB/M/Jun26/G4005/E9 7405/1
, 2
Do not write
outside the
Answer all questions in the spaces provided. box
0 1 This question is about the element aluminium.
0 1 . 1 State the block in the Periodic Table that contains aluminium.
[1 mark]
0 1 . 2 Give an equation for the process that occurs when the first ionisation energy of
aluminium is measured.
Include state symbols.
[1 mark]
0 1 . 3 The successive ionisation energies of some elements (X, Y and Z) are shown.
Ionisation energy / kJ mol–1
Element First Second Third Fourth Fifth Sixth
X 736 1450 7740 10 500 13 600 18 000
Y 1060 1900 2920 6280 21 200 25 900
Z 577 1820 2740 11 600 14 800 23 400
Which element is aluminium?
[1 mark]
Tick () one box.
X
Y
Z
*02*
IB/M/Jun26/7405/1
, 3
Do not write
outside the
0 1 . 4 State why the second ionisation energy of aluminium is higher than the box
first ionisation energy of aluminium.
[1 mark]
0 1 . 5 Explain, with reference to structure and bonding, why the melting point of aluminium is
lower than the melting point of silicon.
[3 marks]
7
Turn over for the next question
Turn over ►
*03*
IB/M/Jun26/7405/1
, 4
Do not write
outside the
0 2 This question is about strontium bromide. box
0 2 . 1 Give the meaning of the term enthalpy of lattice formation.
[2 marks]
0 2 . 2 Figure 1 shows an incomplete Born−Haber cycle for the formation of
strontium bromide.
The diagram is not to scale.
Figure 1
Complete Figure 1 by writing the formulas, including state symbols, of the appropriate
species on each of the two blank lines.
[2 marks]
*04*
IB/M/Jun26/7405/1
Centre number Candidate number
Surname
Forename(s)
Candidate signature
I declare this is my own work.
A-level
CHEMISTRY
Paper 1 Inorganic and Physical Chemistry
Tuesday 2 June 2026 Morning Time allowed: 2 hours
Materials
For Examiner’s Use
For this paper you must have:
• the Periodic Table/Data Booklet, provided as an insert (enclosed) Question Mark
• a ruler with millimetre measurements 1
• a scientific calculator, which you are expected to use where appropriate.
2
Instructions 3
• Use black ink or black ball-point pen. 4
• Fill in the boxes at the top of this page. 5
• Answer all questions.
• You must answer the questions in the spaces provided. Do not write outside 6
the box around each page or on blank pages. 7
• If you need extra space for your answer(s), use the lined pages at the end of 8
this book. Write the question number against your answer(s).
• All working must be shown. TOTAL
• Do all rough work in this book. Cross through any work you do not
want to be marked.
Information
• The marks for questions are shown in brackets.
• The maximum mark for this paper is 105.
*Jun *
IB/M/Jun26/G4005/E9 7405/1
, 2
Do not write
outside the
Answer all questions in the spaces provided. box
0 1 This question is about the element aluminium.
0 1 . 1 State the block in the Periodic Table that contains aluminium.
[1 mark]
0 1 . 2 Give an equation for the process that occurs when the first ionisation energy of
aluminium is measured.
Include state symbols.
[1 mark]
0 1 . 3 The successive ionisation energies of some elements (X, Y and Z) are shown.
Ionisation energy / kJ mol–1
Element First Second Third Fourth Fifth Sixth
X 736 1450 7740 10 500 13 600 18 000
Y 1060 1900 2920 6280 21 200 25 900
Z 577 1820 2740 11 600 14 800 23 400
Which element is aluminium?
[1 mark]
Tick () one box.
X
Y
Z
*02*
IB/M/Jun26/7405/1
, 3
Do not write
outside the
0 1 . 4 State why the second ionisation energy of aluminium is higher than the box
first ionisation energy of aluminium.
[1 mark]
0 1 . 5 Explain, with reference to structure and bonding, why the melting point of aluminium is
lower than the melting point of silicon.
[3 marks]
7
Turn over for the next question
Turn over ►
*03*
IB/M/Jun26/7405/1
, 4
Do not write
outside the
0 2 This question is about strontium bromide. box
0 2 . 1 Give the meaning of the term enthalpy of lattice formation.
[2 marks]
0 2 . 2 Figure 1 shows an incomplete Born−Haber cycle for the formation of
strontium bromide.
The diagram is not to scale.
Figure 1
Complete Figure 1 by writing the formulas, including state symbols, of the appropriate
species on each of the two blank lines.
[2 marks]
*04*
IB/M/Jun26/7405/1
