OCR GCSE Combined Science A · J250
Specification C1.2b, C1.2c, P1.1c · Chemistry Paper 1, Physics Paper 1
Revise: Structure of the AtomThe nuclear radius measures the size of the nucleus; the atomic radius measures the much larger extent of the whole atom, including its surrounding electrons.
- Revise: Size of Atoms and Molecules
An approximate distance from the centre of an atom to the outer extent of its electron region.