A nuclide of fluorine can be represented by 919F^{19}_{9}\text{F}919F.
Which of the following options gives the correct numbers of particles in a neutral fluorine atom?
101010 electrons, 999 protons, 191919 neutrons
999 electrons, 999 protons, 101010 neutrons
101010 electrons, 101010 protons, 999 neutrons
191919 electrons, 191919 protons, 999 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.