12 Scientists who Contributed to atomic theory
Erwin Schrödinger
Developed a method for predicting the location of electrons, collaborated to develop the electron cloud model.
Niels Bohr
Developed the Bohr Model
Henry Moseley
Developed the application of X-ray spectra to study atomic structure, changed the numbering system from being based on Mass to being on based on protons.
James Chadwick
Discovered Neutrons
J.J. Thomson
Discovered electrons, developed the Plum Pudding Model
Ernest Rutherford
Discovered that atoms were mostly made of empty space and that electrons orbit around the nucleus
Louis De Broglie
Discovered that electrons can act like particles and waves, just like light.
Werner Heisenberg
Discovered that electrons do not travel in neat orbits, collaborated to develop the electron cloud model.
Max Planck
Discovered that light and other electromagnetic waves were emitted in packets of energy called "quanta"
Democritus
Invented the idea of the atom, thought that atoms were indivisible, believed that different states of matter had differently shaped atoms.
Robert Millikan
Performed the Oil Drop experiment, discovered the charge of electrons
John Dalton
Postulated that Atoms were dense spheres, proposed that atoms of the same element are identical, stated that chemical reactions are the rearrangement of atoms.