What defines two nuclei as isotopes?
They have the same neutron number but different proton numbers.
They have the same proton number but different neutron numbers.
They have the same nucleon number but different proton numbers.
They have different proton numbers but the same neutron numbers.
Flashcards for Edexcel A Level Physics Background radiation and nuclear emissions, covering the key terms, definitions and equations you need to recall for Paper 1, Paper 2 and Paper 3. 27 cards, matched to the Edexcel A Level Physics (9PH0) specification.
