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1.2 Atomic structure

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Question 21
F

A student records the numbers of protons, neutrons and electrons in four ions.

IonProtonsNeutronsElectrons
23Na+{}^{23}\mathrm{Na^{+}}23Na+111212
19F−{}^{19}\mathrm{F^{-}}19F−91010
40Ca2+{}^{40}\mathrm{Ca^{2+}}40Ca2+202022
27Al3+{}^{27}\mathrm{Al^{3+}}27Al3+131310

For which ion are all three numbers correct?

[1]
A

23Na+{}^{23}\mathrm{Na^{+}}23Na+

B

27Al3+{}^{27}\mathrm{Al^{3+}}27Al3+

C

40Ca2+{}^{40}\mathrm{Ca^{2+}}40Ca2+

D

19F−{}^{19}\mathrm{F^{-}}19F−

Markscheme

1.2 Atomic structure Questions

  1. GCSE
  2. /Chemistry
  3. /1.2 Atomic structure

51 exam-style questions on OCR GCSE Chemistry 1.2 Atomic structure, covering 1.2.1 Development of the atomic model, 1.2.2 The nuclear model and the size of atoms, and 1.2.3 Subatomic particles in atoms and ions. Each one has a worked solution and a mark scheme showing where the marks go.

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