Atomic Theory Timeline

By Sydneydry
  • 400

    Democritus

    Democritus
    Called them Atomos
    - They are solid
    - Different types of atomos are different shapes of sizes

  • Dalton

    Dalton
    • He called them atoms
    • Atoms aren't created or destroyed during chemical reactions, they just get rearranged

  • Thompson

    Thompson
    • Called the Plum Model
    • Atoms have negative particles called electrons which are surrounded by positive charge.

  • Rutherford

    Rutherford
    • Atoms mass in the nucleus
    • Electrons are in orbitals around the atom's nucleus.

  • Bohr

    Bohr
    • Called " Planetary Model"
    • The electrons orbitals have different energy levels.

  • Schrodinger

    Schrodinger
    • Called "Quantum Mechanical Model"
    • Electrons orbitals have different shapes
    • Electrons are waves of energy