A science museum has four panels about models of the atom. The panels are to be placed in a timeline in the order in which the models were developed. The panels are about the model with electrons in fixed energy levels, the solid sphere model, the nuclear model and the plum pudding model.
Which one of these panels should be placed third in the timeline?
The panel about the solid sphere model
The panel about the nuclear model
The panel about the plum pudding model
The panel about fixed energy levels
93 exam-style questions on AQA GCSE Chemistry 1.1 A simple model of the atom, symbols, relative atomic mass, electronic charge and isotopes, covering 1.1.1a Atoms, elements and compounds, 1.1.1b Half equations and ionic equations, 1.1.2 Mixtures, 1.1.3 The development of the model of the atom (common content with physics), 1.1.4 Relative electrical charges of subatomic particles, 1.1.5 Size and mass of atoms, 1.1.6 Relative atomic mass, and 1.1.7 Electronic structure. Each one has a worked solution and a mark scheme showing where the marks go.