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5.1 The nuclear model of the atom

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Question 15

Table 12.1 describes four nuclides.

Table 12.1

Name of nuclidecarbon-12carbon-14nitrogen-14oxygen-16
Nuclide notation612C^{12}_{6}\text{C}612​C614C^{14}_{6}\text{C}614​C714N^{14}_{7}\text{N}714​N816O^{16}_{8}\text{O}816​O
a.

(i) State which two nuclides have the same number of protons.

(ii) State which two nuclides have the same number of nucleons.

(iii) State which one of the four nuclides has the most electrons orbiting its nucleus when it is in a neutral atom.

[3]
b.

Carbon-14 has a half-life of 5700 years. A sample of radioactive material contains 80 mg of carbon-14.

Calculate the mass of carbon-14 remaining after 17100 years.

[3]
Markscheme

5.1 The nuclear model of the atom Questions

  1. IGCSE
  2. /Physics
  3. /5.1 The nuclear model of the atom

284 exam-style questions on CIE IGCSE Physics 5.1 The nuclear model of the atom, covering 5.1.1a Structure of the atom and ions, 5.1.1b Alpha-particle scattering, 5.1.2a Composition of the nucleus and isotopes, 5.1.2b Proton number, nucleon number and nuclide notation, and 5.1.2c Nuclear fission and nuclear fusion. Each one has a worked solution and a mark scheme showing where the marks go.

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