Atomic Model Timeline

  • Dalton Model

    Dalton Model
    Each element has different elements and is made of small atoms which is explained in John Daltons' book "New System of Chemical Philosphy."
  • Thomson Model

    Thomson Model
    J.J Thomson stated that an atom was a positively-charged sphere with electrons. This was discribed looking like a blue-beryy muffin.
  • Nagaoka Model

    Nagaoka Model
    Hantaro Nagaoka's model said that an atom had a large sphere in the center with a postitve charge. This model was showed with electrons revolving around the center like planets around the sun.
  • Rutherford Model

    Rutherford Model
    Ernest Rutherford stated that atoms mostly are empty space, and random small electrons orbit around a small positively charged nucleus.
  • Bohr Model

    Bohr Model
    On the other hand Niels Bohr stated that electrons don't t randomly orbit around the nucleus. The model is showed with electrons moving in the specific position.
  • Modern Model

    Modern Model
    Since the 1920's till this day many scientists showed that electrons forming a negatively charged cloud around the nuleus, but also stated that it is impossible to determine exactly where am electrons is at any time.
  • Chadwick Model

    Chadwick Model
    James Chadwick concluded that the existance of the neutron was why it was heavier than the total mass of their protons and electrons, but with no electrical charge.