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Dalton Model
John Dalton pictures atoms as tiny, indestructible particles, with no internal structure -
Thompson Model
J.J. Thompson discovers the electron which later leads to his "plum pudding" model. -
Hantaro Nagaoka
Japanese physicist suggests that an atom has a central nucleus. Electrons move in orbits like the rings around saturn -
Rutherford Model
Rutherford finds that an atom has a small, dense, positively charged nucleus -
Bohr Model
The electron moves in a circular orbit at fixed distances from the nucleus -
Broglie
Moving particles like electrons have some properties of waves. -
Electron Cloud Model
Erwin develops mathematical equations to describe the motion of electrons in atoms. -
Chadwick
confirms existence of neutrons.