A materials scientist analyses two neutral atoms from different metal samples.
| Atom | Mass number | Relative nuclear charge |
|---|---|---|
| P | 63 | +29 |
| Q | 65 | +29 |
Explain, using calculations, why P and Q are isotopes.
Atom Q then loses one electron.
Explain whether Q is still the same isotope after losing the electron.
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.