0654.C2.2.03 — Define proton number / atomic number as the number of protons in the nucleus of an atom: past paper questions
Real questions on 0654.c2.2.03 — define proton number / atomic number as the number of protons in the nucleus of an atom
The newest 6 of 6 written questions. Open one to see it on the real paper.
- 0973/32 · May/June 2025 · Q7a(i)[1]
State what the number 29 represents.
See it on the paper → - 0973/42 · May/June 2025 · Q5c[1]
State the number of atoms in 1 mole of carbon. number of atoms =
See it on the paper → - 0973/31 · October/November 2022 · Q8a(i)[1]
State the number of electrons in this copper atom.
See it on the paper → - 0973/32 · May/June 2022 · Q8a(iv)[1]
State the number of electrons in an iodine atom.
See it on the paper → - 0973/42 · May/June 2021 · Q11b(i)[1]
State which atom has a proton number (atomic number) of 3.
See it on the paper → - 0973/31 · October/November 2020 · Q8d(i)[2]
Explain why a potassium atom is electrically neutral. Use ideas about the charges on the particles in your answer.
See it on the paper →
What examiners said
Many candidates thought 29 represented the number of electrons or the mass number of the atom, although a large proportion did know it was the proton number. Candidates are encouraged to be specific in their use of language and state in full that the ‘number of protons’ is represented by this number not just ‘protons’.
— Examiner report, May/June 2025, 0973/32 Q7(a)(i) (Cambridge)
Few candidates were able to state the number of atoms in 1 mole. Candidates that did attempt this often gave an inaccurate value.
— Examiner report, May/June 2025, 0973/42 Q5(c) (Cambridge)
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