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CAIE A-Level Physics AS 11.1.6 Nucleon Number and Charge Are Conserved in Nuclear Processes Questions

Apply conservation of nucleon number and charge to check nuclear equations, follow decay chains and identify missing particles or products.

Syllabus
2028–2030
Course
Physics 9702
Level
AS

Exam points

  • Identify isotopes as nuclei of the same element with the same proton number but different neutron numbers.
  • Compare isotope compositions by matching proton numbers and distinguishing their neutron counts.

CAIE A-Level Physics AS 11.1.6 Nucleon Number and Charge Are Conserved in Nuclear Processes Questions question 1

[Maximum number: 1]

Two vertical metal plates are separated by a distance d in a vacuum, as shown in Fig. 7.1.

Fig. 7.1 (not to scale)

Fig. 7.1 (not to scale)

The potential difference (p.d.) between the plates is V. A nucleus with charge +q is initially at rest on plate X . The nucleus is accelerated by the uniform electric field from plate X along a horizontal path to plate Y .

The nucleus is carbon- 14(614C)14\left({ }_{6}^{14} \mathrm{C}\right). This nucleus decays to form a new nucleus by releasing a β−\beta^{-}particle and only one other particle of negligible mass.

Calculate the nucleon number and the proton number of the new nucleus.

 nucleon number =  proton number = \begin{aligned} & \text { nucleon number = } \\ & \text { proton number = } \end{aligned}
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