In 1897, J.J. Thomson proposed the 'plum pudding' model, which represented the atom as a sphere of positive charge with embedded electrons. In 1911, Ernest Rutherford developed the nuclear model of the atom after analyzing the results of the alpha particle scattering experiment.
State two differences between Thomson's 'plum pudding' model and Rutherford's nuclear model of the atom.
87 exam-style questions on Edexcel GCSE Chemistry 2.1 Atomic structure, covering 2.1.1 Development of the atomic model, 2.1.2 Structure of the atom and subatomic particles, 2.1.3 Mass number, isotopes and relative atomic mass, and 2.1.4 Calculating relative atomic mass from isotopic abundance. Each one has a worked solution and a mark scheme showing where the marks go.