Ben Parker Famous Dead Guys

  • 101

    Democritus - 429 BC

    First person to think of the atom.
    Thought atom was solid sphere.
  • 120

    Aristotle - 400 BC

    Everything made up of fire, earth, air, and water
  • Isaac Newton

    Tiny pieces of mass swimming everywhere.
  • John Dalton

    Atomic Theory:
    1) All matter is composed of atoms. True
    2) Atoms cannot be made or destroyed. False
    3) All atoms of the same element are identical. False
    4) Different elements have different types of atoms. True
    5) Chemical reactions occur when atoms are rearranged. True
    6) Compounds are formed from atoms of different elements. True
  • Henri Becquerel

    Helped discover radioactivity.
  • Joseph John Thomson

    Proved negatively charged particles. (Electrons)
  • Robert Millikan

    Measured charge and mass of an electron.
  • Rutherford

    Atom has a central positive nucleus surrounded by negative orbiting electrons
  • Neils Bohr

    Atoms are small positively charged nucleus surrounded by electrons traveling in circular orbit
  • Francis Aston

    Isotopes of non-radioactive elements
    212 natural atoms
  • Erwin

    Nucleus and shells
    Each shell contains subshells
  • James Chadwick

    Discovered Neutron