Atoms

Scientists and Atoms

By kalexander3
  • 400

    Democritus

    Democritus
    -Matter is made of particles called atmos.
    -Atoms are solid and invisible.
    -Different kinds of atoms have different sizes and shapes.

  • Dalton

    Dalton
    -Matter is made of small particles called atoms.
    -Atoms of a given element are identical, but they differ from those of any other element.
    -Atoms are neither created nor destroyed by chemical reactions, but they are arranged.

  • Thompson

    Thompson
    -Discovered electrons with his cathode ray experiment.
    -Developed "plum pudding" atomic model.
    -Negatively charged electrons in a "soup" of positive charges.

  • Rutherford

    Rutherford
    -Most of an atom's mass is in its nucleus.
    -The nucleus has a positive charge.
    -Electrons are in fixed orbitals surrounding the nucleus.

  • Bohr

    Bohr
    -"Planetary" atom model in which the nucleus is surrounded by electrons in orbitals with different energy levels.

  • Schrodinger

    Schrodinger
    -Quatum Mechanical Atomic Model
    -Electron orbitals have different shapes.
    -Electrons are both particles and waves of energy at the same time.