A computer model gives data for an atom.
| Measurement | Value |
|---|---|
| Contribution of the nucleus to the atom's mass | 99.98% |
| Contribution of the electrons to the atom's mass | 0.02% |
| Distance from the centre to the outer edge of the nucleus | 8.0 × 10-15 m |
| Distance from the centre to the outermost electrons | 1.2 × 10-10 m |
A student concludes that the nucleus on its own can be used to estimate both the mass and the radius of the atom.
Calculate how many times greater the distance from the centre to the outermost electrons is than the distance from the centre to the outer edge of the nucleus.
Evaluate the student's conclusion. Use the data in the table and your answer to part (a).
101 exam-style questions on OCR GCSE Chemistry 1.2 Atomic structure, covering 1.2.1 Development of the atomic model, 1.2.2 The nuclear model and the size of atoms, and 1.2.3 Subatomic particles in atoms and ions. Each one has a worked solution and a mark scheme showing where the marks go.