A computer program uses two models to estimate the relative mass of an atom.
For one neutral atom, the nucleus contains 37 nucleons and has a relative charge of +17.
| Particle | Relative charge | Relative mass |
|---|---|---|
| proton | +1 | 1 |
| neutron | 0 | 1 |
| electron | -1 | 11836\displaystyle \frac{1}{1836}18361 |
Calculate the relative mass of the atom predicted by Model Q.
Two students make these comments.
Student 1: Model P and Model Q give the same value when the relative mass is given to the nearest whole number.
Student 2: Model P gives the exact relative mass of the atom.
Explain whether each student is correct.
94 exam-style questions on Edexcel GCSE Physics 10.1 Circuits, charge and current, covering 10.1.1 Structure of the atom, 10.1.2 Circuit diagrams and symbols, 10.1.3 Series and parallel circuits, 10.1.4 Potential difference and voltmeters, 10.1.5 Energy transferred, charge and potential difference, and 10.1.6 Current, ammeters and charge flow. Each one has a worked solution and a mark scheme showing where the marks go.