What is a nitrogen nucleus, 714N^{14}_{7}\text{N}714N, composed of?
7 neutrons and 7 electrons
7 protons, 7 neutrons and 7 electrons
7 protons and 7 electrons
7 protons and 7 neutrons
284 exam-style questions on CIE IGCSE Physics 5.1 The nuclear model of the atom, covering 5.1.1a Structure of the atom and ions, 5.1.1b Alpha-particle scattering, 5.1.2a Composition of the nucleus and isotopes, 5.1.2b Proton number, nucleon number and nuclide notation, and 5.1.2c Nuclear fission and nuclear fusion. Each one has a worked solution and a mark scheme showing where the marks go.