Atom stuff

By J.morgan
  • 440 BCE

    Democritus

    Democritus
    said matter was composed of tiny particles gave them the name A tomos:uncuttable or indivisible

  • Dalton

    Dalton
    All matter was composed of atoms. Different elements had atoms differing size and mass.

  • Thompson

    Thompson
    founded the electron. Positively packed spheres with negativity charged electrons.

  • Rutherford

    Rutherford
    Atoms consisted largely of empty space while most of the mass focused in the center and called the nucleus

  • Bohr

    Bohr
    1. Found electrons orbited the nucleus. Electrons jumped from one ring to another but never in the space in between.