Niel

Corbin Greathouse

By corbin.greathouse
  • 101

    Democritis- 429 BC

    First peron to think of the atom.
    Thought atom was a solid circle.
  • 101

    Aristotle- 400 BC

    Everything is made from four elements. Fire, Air, Earth, and Water.

  • Sir Issaac Newton

    Tiny pieces of mass "swam" around.

  • John Dalton

    Atomic Theory.
    1. All matter is composed of atoms. true
    2.Atoms can not be destroyed. false
    3. All atoms of the same elements are identical. false
    4. Different elements have different types of atoms. true
    5.Chemical reactions occur when atoms are rearanged. true
    6. Compounds are formed from atoms of different elements. true

  • Henri Becquerel

    Radio activity.

  • J.J. Thompson

    Proved the exsitence of negatively charged atoms.

  • Robert Millikan

    Measured Charge of single electron.
    Measured mass of electrons.

  • Rutherford

    Atoms have a central positively charged nucleus surrounded by negatively charged obiting electron.

  • Neils Bohr

    Bohr Model- Electron travel in a circular orbit

  • Francis Aston

    Isotopes non-radioactive

  • Erwin Shrodiner

    Atom has a nucleus shell formula

  • James Chadwick

    discovered Nuetron