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#O C R GCSE (9–1) Chemistry B (Twenty First Century Science) J258/04 Depth in Chemistry (Higher Tier) June 2023 $17.49   Add to cart

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#O C R GCSE (9–1) Chemistry B (Twenty First Century Science) J258/04 Depth in Chemistry (Higher Tier) June 2023

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#O C R GCSE (9–1) Chemistry B (Twenty First Century Science) J258/04 Depth in Chemistry (Higher Tier) June 2023

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  • January 31, 2024
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  • 2023/2024
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#O C R
GCSE (9–1) Chemistry B (Twenty First Century Science)
J258/04 Depth in Chemistry (Higher Tier)
June 2023




Time allowed: 1 hour 45 minutes

You must have:
a ruler (cm/mm)
the Data Sheet for GCSE (9–1) Chemistry B (inside this
document)
H
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 90.
• 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 Scientists use models to represent atoms. These models have changed over time.

Dalton’s model and a modern model of an atom are shown in the diagrams.




Solid sphere




Dalton’s model Modern model


(a) Give two differences between the modern model and Dalton’s model.

1 ................................................................................................................................................

...................................................................................................................................................

2 ................................................................................................................................................

...................................................................................................................................................
[2]

(b) Which element is represented by the modern model in the diagram?

Explain your answer.

Use the Data Sheet.

Element ....................................................................................................................................

Explanation ...............................................................................................................................

...................................................................................................................................................

...................................................................................................................................................
[2]




2023

, 3
(c) Dalton used symbols for atoms to write formulae.

Each symbol represented a different type of atom.

Some of Dalton’s formulae are shown in the table.

Dalton’s formula



Carbon dioxide




Chlorine



(i) Explain how Dalton’s formula for carbon dioxide agrees with its modern formula.

...........................................................................................................................................

.................................................................................................................................... [1]

(ii) Give two reasons why Dalton’s formula for chlorine disagrees with its modern formula.

1 ........................................................................................................................................

...........................................................................................................................................

2 ........................................................................................................................................

...........................................................................................................................................
[2]

(d) Put the particles in order from largest to smallest.

Atom Electron Molecule of oxygen Polymer Proton

Largest ................................

................................

................................

................................

Smallest ................................
[2]




2023 Turn over

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