Calculation of the diameter of an atom 
Electric charges
Electric charges (video)
Crookes's experiment
The discovery of the electron
The discovery of the electron: Perrin and Thomson
Determination of electron charge and mass: R.A. Millikan
Radioactivity
Radioactivity (video)
Rutherford's experiment(video)
Rutherford's experiment (images)
Calculation of the diameter of the nucleus: Interpretation of Rutherford's experiment
The discovery of the atom structure: Interpretation of Rutherford's experiment
Potential and kinetic energy (animation)
Electron layers in Bohr's model
Wilson's chamber (video)
Visualisation of fundamental particles: Wilson's chamber
The discovery of the proton: Rutherford (animation)
The discovery of the neutron: Chadwick (animation)
The atomic nucleus
Calculating with elementary particles: protons, neutrons and electrons
Structure of atoms: protons, neutrons and electrons
Isotopes
Radioactivity (animation)
The effects of radioactivity
Nuclear fission(video)
Nuclear fission (animation)
The A atomic bomb
The nuclear reactor
The iodine 131 from Tchernobyl
The desaster of Fukushima
Nuclear fusion
The periodic table
A simplified periodic table