0653.C2.2.04 — Define mass number / nucleon number as the total number of protons and neutrons in the nucleus of an atom: past paper questions
Real questions on 0653.c2.2.04 — define mass number / nucleon number as the total number of protons and neutrons in the nucleus of an atom
The newest 7 of 7 written questions. Open one to see it on the real paper.
- 0653/33 · May/June 2025 · Q4c[2]
The Periodic Table gives information about an atom of fluorine, as shown in Fig. 4.2. 9 F fluorine 19 Fig. 4.2 Deduce the number of protons and neutrons in this atom of fluorine. number of protons
See it on the paper → - 0653/21 · May/June 2024 · Q16[1]
Which statement defines the nucleon number of an atom?
See it on the paper → - 0653/33 · October/November 2023 · Q5c(iii)[1]
Alkenes form addition polymers. Name one alkene and the addition polymer that it forms. alkene
See it on the paper → - 0653/33 · October/November 2023 · Q8a(ii)[1]
State what is meant by the term diatomic.
See it on the paper → - 0653/12 · October/November 2022 · Q25[1]
Which statements are correct?
See it on the paper → - 0653/33 · October/November 2022 · Q2d[2]
An atom of iron is represented as shown. 56 26 Fe Deduce the number of electrons, protons and neutrons in this atom. electrons protons neutrons
See it on the paper → - 0653/22 · May/June 2022 · Q20[1]
Which cation is present in Q and what is gas R?
See it on the paper →
What examiners said
The proton number of fluorine is the atomic number shown at the top of the box, 9. The bottom number in the box is the relative atomic mass, 19. This indicates the total number of protons and neutrons in the atom. Since we know that there are 9 protons, there must be 19 – 9 neutrons = 10. Incorrect answers included 10 and 9 in the wrong places, and 19 anywhere was incorrect.
— Examiner report, May/June 2025, 0653/33 Q4(c) (Cambridge)
A few candidates successfully stated poly(ethene) as the addition polymer for ethene. It was clear that the remaining candidates found this question challenging.
— Examiner report, October/November 2023, 0653/33 Q5(c)(iii) (Cambridge)
Some candidates gave a correct definition for diatomic. Other candidates were unfamiliar with the term, and some did not attempt a response.
— Examiner report, October/November 2023, 0653/33 Q8(a)(ii) (Cambridge)
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