Atom model 02

Atomic Model Timeline

By facebooker_100001816847230
  • 300

    Democritus

    Determined that atoms are indivisible particles

  • Dalton

    Dalton
    The solid sphere model:
    Describes atoms as solid, indestructible spheres

  • Thompson

    Thompson
    The raisin bun Model:
    Describes atoms as solid spheres made-up of a solid positive mass with tiny negative particles embedded in the positive core.

  • Rutherford

    Rutherford
    The Planetary Model:
    Gold Leaf Experiment proves that the nucleus is positive and the electrons are outside the nucleus.

  • Bohr- Rutherford

    Bohr- Rutherford
    Used atomic spectra to prove that electrons are placed in orbitals around the nucleus

  • Modern Theory

    Modern Theory
    Electron Cloud Model:
    Describes electrons moving around the nucleus in a "cloud" of energy levels