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Atomic Theory Timeline
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Dalton's Theory
He proposed the theory that all matter is made up of individual particles called atoms, which cannot be divided. -
JJ Thomson
His experiments provided the first evidence that atoms are made of even smaller particles. -
Rutherford's Model
Ernest Rutherford's model shows all of an atom's positive charge is concentrated in its nucleus. -
Bohr's Model
Neils Bohr explains that an electron in an atom can move from one energy level to another when the atom gains or loses electrons.
