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6.1 Atomic structure and isotopes

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Question 14

The isotopes carbon-12 (612C_{6}^{12}\text{C}612​C) and carbon-14 (614C_{6}^{14}\text{C}614​C) are of central importance in physics and archaeology. Let S12S_{12}S12​ be the specific charge of a bare carbon-12 nucleus, and S14S_{14}S14​ be the specific charge of a bare carbon-14 nucleus.

Assuming the mass of a nucleon is constant (i.e., neglecting mass defect), what is the ratio of their specific charges, S14S12\displaystyle \frac{S_{14}}{S_{12}}S12​S14​​?

A

111

B

76\frac{7}{6}67​

C

67\frac{6}{7}76​

D

12\frac{1}{2}21​

Markscheme

6.1 Atomic structure and isotopes Questions

  1. GCSE
  2. /Physics
  3. /6.1 Atomic structure and isotopes

81 exam-style questions on Edexcel GCSE Physics 6.1 Atomic structure and isotopes, covering 6.1.1 Structure of the atom, 6.1.2 Isotopes: atomic and mass number, 6.1.3 Sub-atomic particles: masses and charges, and 6.1.4 Electron orbits and energy changes. Each one has a worked solution and a mark scheme showing where the marks go.

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