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Dalton Model
Dalton believed atoms were tiny, indestructible, and no internal structure -
Thomson Model
Thoson discovered the electron. Imagines electrons embedded in a sphere of positive electrical charge -
Hantaro Nagasoka
suggested that atoms have a central nucleus and move in orbits -
Rutherford Model
Rutherford finds atoms have small dense positively charged nuclei. Electrons move around nucleus -
Bohr Model
electrons move in circular orbits at fixed distances from the nucleus -
Loius de Broglie
proposed moving particles have some properties of waves -
electron Cloud Model
Schrodinger develops mathematical equations to describe motion of electrons in atoms. Led to electron cloud model -
James Chadwick
Confirmed existence of neutrons which have no charge. Atomic nuclei contain neutrons and positively charged protons