2023 AQA AS CHEMISTRY 7404/1 Paper 1
Inorganic and Physical Chemistry Question
Paper & Mark scheme (Merged) June 2023
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AS
CHEMISTRY
Paper 1 Inorganic and Physical Chemistry
Tuesday 16 May 2023 Morning Time allowed: 1 hour 30 minutes
Materials
For this paper you must have: For Examiner’s Use
• the Periodic Table/Data Sheet, provided as an insert (enclosed)
• a ruler with millimetre measurements Question Mark
• a scientific calculator, which you are expected to use where appropriate. 1
2
Instructions
3
• Use black ink or black ball-point pen.
• Fill in the boxes at the top of this page. 4
• Answer all questions. 5
• 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
this book. Write the question number against your answer(s). 8
• All working must be shown. Section B
• Do all rough work in this book. Cross through any work you do not
TOTAL
want to be marked.
Information
• The marks for questions are shown in brackets.
• The maximum mark for this paper is 80.
Advice
You are advised to spend about 65 minutes on Section A and 25 minutes on Section B.
, 2
Do not write
outside the
Section A box
Answer all questions in this section.
0 1This question is about the elements in Period 3.
0 1 . 1 Give the full electron configuration of the element in Period 3 with the
highest first ionisation energy.
[1 mark]
0 1 . 2 Give an equation, including state symbols, to represent the process that occurs when the
second ionisation energy of sodium is measured.
[1 mark]
0 1 . 3 Table 1 shows some successive ionisation energies for an element in Period 3.
Do not write
outside the
0 2This question is about the elements in Group 2. box
0 2 . 1Describe the structure and bonding in magnesium.
[2 marks]
0 2 . 2 State the trend in the atomic radius of the elements down Group 2 from Mg to Ba
Give a reason for this trend.
[2 marks]
Trend
Reason
0 2 . 3 Give an equation, including state symbols, for the reaction of magnesium with steam.
State two observations for this reaction.
[3 marks]
Equation
Observation 1
Observation 2
Question 2 continues on the next page
Turn over ►
*03*
IB/M/Jun23/7404/1
, 4
Do not write
outside the
0 2 . 4 The sulfates of the elements in Group 2 from Mg to Ba have different box
solubilities. State the formula of the least soluble of these sulfates.
Give a use for this sulfate.
[2 marks]
Formula
Use
0 2 . 5 A sample of strontium is made up of only three isotopes: 86Sr, 87Sr and 88Sr This
sample contains 83.00% by mass of 88Sr
This sample of strontium has Ar = 87.73
Calculate the percentage abundance of each of the other two isotopes in this sample.
[4 marks]
% abundance 87Sr =
% abundance 86Sr =
*04*
IB/M/Jun23/7404/1
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