Which subatomic particle determines the identity of an element?
The number of electrons (charge number).
The number of protons (atomic number).
The number of nucleons (mass number).
The number of neutrons (mass number).
Flashcards for OCR GCSE Physics Radioactive emissions, covering the key terms, definitions and equations you need to recall for Paper 1 and Paper 2 (Foundation Tier) or Paper 3 and Paper 4 (Higher Tier). 27 cards, matched to the OCR GCSE Physics (J249) specification. Recall questions account for roughly 40% of marks at GCSE Physics, so these target the marks you can secure before the paper starts.
