In 1909, Geiger and Marsden fired alpha particles at a very thin sheet of gold foil. Most passed straight through, but a few were deflected through large angles.
What did most alpha particles passing straight through the foil show about the atom?
What did the large deflections show about the positive charge in the atom?
Explain why the plum pudding model could not account for the large deflections.
101 exam-style questions on OCR GCSE Chemistry 1.2 Atomic structure, covering 1.2.1 Development of the atomic model, 1.2.2 The nuclear model and the size of atoms, and 1.2.3 Subatomic particles in atoms and ions. Each one has a worked solution and a mark scheme showing where the marks go.