A radioactive isotope of phosphorus, phosphorus-32, is widely used in medicine for targetted radiotherapy and molecular biology research.
An atom of phosphorus-32 is represented by the symbol:
1532P {}^{32}_{15}\text{P} 1532PState the number of neutrons in one atom of phosphorus-32.
81 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.