To generate energy through nuclear fusion, hydrogen isotopes must be brought extremely close together. Which row in the table correctly identifies the temperature required for this process and the nature of the electrostatic force that must be overcome?
| Temperature required | Electrostatic force to be overcome | |
|---|---|---|
| A | very low | attractive |
| B | very low | repulsive |
| C | very high | attractive |
| D | very high | repulsive |
Row A
Row B
Row C
Row D
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.