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#O C R A Level Chemistry A H432/03 Unified chemistry June 2023
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#O C R A Level Chemistry A H432/03 Unified chemistry June 2023
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#O C RA Level Chemistry A
H432/03 Unified chemistry
June 2023
Time allowed: 1 hour 30 minutes
You must have:
the Data Sheet for Chemistry A
You can use:
a scientific or graphical calculator
an HB pencil
Please write clearly in black ink. Do not write in the barcodes.
Centre number Candidate number
First name(s)
Last name
INSTRUCTIONS
• Use black ink. You can use an HB pencil, but only for graphs and diagrams.
• Write your answer to each question in the space provided. If you need extra space use
the lined pages at the end of this booklet. The question numbers must be clearly shown.
• Answer all the questions.
• Where appropriate, your answer should be supported with working. Marks might be
given for using a correct method, even if your answer is wrong.
INFORMATION
• The total mark for this paper is 70.
• The marks for each question are shown in brackets [ ].
• Quality of extended response will be assessed in questions marked with an asterisk (*).
• This document has 24 pages.
ADVICE
• Read each question carefully before you start your answer.
,2023 Turn over
, 2
1 This question is about the first 36 elements in the periodic table:
H He
Li Be B C N O F Ne
Na Mg Al Si P S Cl Ar
K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr
From these 36 elements only, write the symbol for the element(s) that fit each description.
(a) The three elements that, when in a molecule, can form hydrogen bonds with other suitable
molecules.
...........................................................[1]
(b) The element in Period 2 with the successive ionisation energies shown below.
Ionisation number 1st 2nd 3rd 4th 5th 6th 7th 8th
Ionisation energy
1000 2251 3361 4564 7012 8496 27 107 31 671
/ kJ mol–1
...................[1]
(c) An element that is a solid at RTP with a simple molecular lattice structure.
...................[1]
2023
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