Chapter 12: Atoms
A full-chapter revision worksheet covering early atomic models, Rutherford's scattering experiment, Bohr's model of the hydrogen atom, atomic spectra, and de Broglie's hypothesis. Total: 44 marks.
Section A: Early Atomic Models and Rutherford Scattering [19 Marks]
Answer the following questions based on early atomic theories and the Geiger-Marsden experiment.
Who proposed the 'plum pudding' model of the atom in 1898?
In Thomson's model of the atom, the positive charge is concentrated in a tiny central nucleus.
The size of the atom in Thomson's model is ________ the atomic size in Rutherford's model.
In the ground state of ________ electrons are in stable equilibrium, while in ________ electrons always experience a net force.
Section B: Bohr's Model and Atomic Spectra [16 Marks]
Answer questions related to atomic spectra and Niels Bohr's model of the hydrogen atom.
Using the provided energy level diagram for hydrogen, calculate the energy required to excite an electron from the ground state (
Section C: De Broglie's Hypothesis and Advanced Concepts [9 Marks]
Answer the following questions about the wave nature of electrons and the limitations of Bohr's model.