Chem - Chapter 1 - Atomic Discovery by Scientists

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Last updated 8:26 PM on 9/25/26
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8 Terms

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JJ Thomson

Existence of electrons (Plum Pudding)

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Millikan

Charge and mass of electron

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Rutherford

Nucleus and positive protons (gold foil)

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Chadwick

Neutrons (alpha particles from Polonium)

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Dalton’s Postulates 1

Atoms are small and indivisible

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Dalton’s Postulates 2

Atoms in an element are identical

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Dalton’s Postulates 3

Atoms are neither created nor destroyed

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Dalton’s Postulates 4

Molecules form a specific ratio