Thegodsofsma

Atomic Model

By hakunalmatata
  • 400 BCE

    Democritus

    Democritus
    Atom is tiny, hard, and uncuttable. The shapes of atom explain behaviors of elements. Atoms of water are round ball. Atoms of fire have sharp edges.
  • Period: 400 BCE to

    Atomic Model Discoveries

    Timeline

  • John Dalton

    John Dalton
    Solid, indivisible sphere. Could not destroy or reconstruct.

  • JJ Thomson

    JJ Thomson
    Atom is a sphere of positive charge containing a few negatively charged particles, called electrons, distributed in the sphere like raisins as a plum pudding.

  • Rutherford

    Rutherford
    Divisible units composed of positive charges concentrated in the nucleus with negative charges orbiting around the nucleus.

  • Niels Bohr

    Niels Bohr
    Electrons in atoms are restricted to contain circular orbit around the nucleus. Similar to the planets orbit around the sun.

  • Schrodinger

    Schrodinger
    A probability to find electrons within a space surrounding the nucleus. The cloud is denser where the probability of finding the electron is high. The cloud is less dense where the probability of finding the electron is low.