The atom timeline

  • Dalton: Sphere Model

    Dalton used symbols to represent the elements and used patterns within the circles to create different elements : 5/19/21
  • Rutherford: The Nuclear Model

    The model demonstrated that That an atom has a tiny, but massive nucleus. Rutherford had been asking why so many alpha particles passed through the gold foil while very few were deflected so greatly. 5/19/21
  • Bohr: The Bohr (planetary) Model

    He made the Model of atoms to show how electrons can have a stable orbit around the nucleus. To remedy the stability problem, He modified the Rutherford Model by requiring that the electrons move in orbits of good size and energy. 5/19/21
  • Schrodinger: Quantum Mechanics Model

    He used mathematical equations to describe the likelihood of finding an electron in a certain position. James Chadwick bombarded beryllium atoms with alpha particles. 5/19/21
  • Thompson: The Plum Pudding Model

    He experimented with cathode ray tubes which showed that all atoms contained tiny negatively charged subatomic particles or electrons. He proposed that the model of the atom which had negatively charged electrons embedded wit positively charged "soup." 5/19/21