He believed in ideas without experimentation¨Nothing exists except atoms and empty space.¨He thought atoms were indivisible.
John Dalton 1766 - 1844
He presented a theory that was difficult to prove.John believed all matter was made of atoms.He believed atoms could not be created or destroyed.
Nols Bohr 1885 - 1962
J. J. Thomson1856 - 1940
John used cathode ray tubes in his experiments.He determined the particles were producing an electric current.He discovered that atoms have charges.
Erwin Schrodinger1887 - 1961
Ernest developed an experiment to test Thomson´s plum pudding model.He shot tiny positively charged particles out of a particle gun toward a thin sheet of gold foil.Detected reflected particles at various angles.
Ernest Rutherfort1871 - 1937
He believed that electrons occupy most energy levels.He believed that electrons reside in orbits.He also believed that the energy of the orbit is related to size.
Erwin believed that electrons don´t move in orbits.He believed electrons exist in specific energy levels as a cloud.He also believed that the electron cloud is the area of negative charges.