History of Atoms

By horchatalover44

  • John Dalton's model

    Solid, hard sphere.
    Indestructible has no charge, nor nucleus, and is static.
    Failed because:
    - Said all matter is composed of indivisible atoms
    - Said atoms of an element are identical in mass

  • JJ Thomson's model

    Negatively charged electrons in a positively charged sphere.
    Static, no nucleus, and is charged.
    Failed because:
    - Didn't consider the reasoning behind atomic reactions or neutrality

  • Ernest Rutherford's model

    The positive charge is concentrated in a nucleus, while most of the atom is empty space where the electrons are distributed.
    Is dynamic, with a nucleus, is charged, and has electrons in an orbit.
    Failed because:
    - Does not obey conservation of energy

  • Neals Bohr's model

    Proton and neutron forms a nucleus, and electrons orbit it.
    Failed because (main reasons):
    - Only works for atoms with 1 electron
    - The model was two-dimensional where an atom is three-dimensional

  • Erwin Schrödinger’s model