IGCSE Co-ordinated Sciences (Double Award) 0654 · Chemistry · 8

0654.C2.2.01 — Describe the structure of the atom as a central nucleus containing neutrons and protons, surrounded by electrons in shells: past paper questions

11 real questionsasked in 1 of the last 10 exam series2021–2025usually: State, Complete, Which

Real questions on 0654.c2.2.01 — describe the structure of the atom as a central nucleus containing neutrons and protons, surrounded by electrons in shells

The newest 11 of 11 written questions. Open one to see it on the real paper.

0654/31 · May/June 2025 · Q5a(i)[1]
is an atom of hydrogen
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0654/31 · May/June 2025 · Q5a(ii)[1]
is in Group VII of the Periodic Table
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0654/31 · May/June 2025 · Q5a(iii)[1]
is a noble gas
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0654/31 · May/June 2025 · Q5a(iv)[1]
is an ion
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0654/31 · May/June 2025 · Q5a(v)[1]
are isotopes of the same element and .
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0654/33 · May/June 2025 · Q7a(i)[1]
State what the number 29 represents.
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0654/33 · May/June 2025 · Q7b[1]
Copper is a transition element. Tick (✓) the three correct statements about copper. copper acts as a catalyst copper forms coloured compounds copper has a low density copper has a low melting point
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0654/33 · May/June 2025 · Q7c(ii)[1]
State what (g) means in the equation in (c)(i). (ii)
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0654/41 · May/June 2025 · Q6a[2]
A sodium atom is represented with numbers next to its chemical symbol, as shown in Fig. 6.1. 23 11 Na Fig. 6.1 Complete Table 6.1 to show the structure of a sodium atom. Table 6.1 atomic number mass number number of protons neutrons electrons
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0654/42 · May/June 2025 · Q5a[1]
The element carbon has a proton (atomic) number of 6. Complete Fig. 5.1 to show the electronic configuration of a carbon atom. C
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0654/11 · May/June 2021 · Q16[1]
Which statement about a carbon dioxide molecule is correct?
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What examiners said

Most candidates identified E, with a range of incorrect answers.
— Examiner report, May/June 2025, 0654/31 Q5(a)(ii) (Cambridge)

Candidates struggled to identify D with a lot giving F but other answers were also seen.
— Examiner report, May/June 2025, 0654/31 Q5(a)(iii) (Cambridge)

Again, candidates found this difficult, identifying D or E as the ion.
— Examiner report, May/June 2025, 0654/31 Q5(a)(iv) (Cambridge)

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Practise 0654.c2.2.01 — describe the structure of the atom as a central nucleus containing neutrons and protons, surrounded by electrons in shells

In the syllabus

8 0654.C2.2.01 — Describe the structure of the atom as a central nucleus containing neutrons and protons, surrounded by electrons in shells

Describe the structure of the atom as a central nucleus containing neutrons and protons, surrounded by electrons in shells
State the relative charges and relative masses of a proton, a neutron and an electron
Define proton number / atomic number as the number of protons in the nucleus of an atom
Define mass number / nucleon number as the total number of protons and neutrons in the nucleus of an atom
Determine the electronic configuration of elements with proton number 1 to 20, e.g. 2,8,3
State that: (a). Group VIII noble gases have a full outer shell (b). the number of outer-shell electrons is equal to the group number in Groups I to VII (c). the number of occupied electron shells is equal to the period number

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