A digital display at a science centre uses a computer model to show how mass is distributed in an atom. The data loaded into the model are shown in the table.
| particle | number in the model | relative mass of each particle |
|---|---|---|
| proton | 17 | 1 |
| neutron | 18 | 1 |
| electron | 17 | 11840\displaystyle \frac{1}{1840}18401 |
When the display is set to show the nucleus only, approximately what percentage of the atom's total mass is represented?
67.31%67.31\%67.31%
99.97%99.97\%99.97%
0.026%0.026\%0.026%
48.56%48.56\%48.56%
103 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.