Chemistry test Over everything

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Who defined the atom as the “smallest bit of matter”

Democritus

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What does atom literally mean

Indivisible

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Who dismissed Democritus idea as worthless 100 years later

Aristotle

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Who stated that matter consisted of elementary lumpy particles?

John Dalton

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Who created the Billiard ball model

John Dalton

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Who discovered the electron with his cathode ray tube experiment

J.J Thompson

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Who came up with the plum pudding model of the atom?

J.J Thompson

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Who stated that “When you vibrate atoms enough you only get energy in whole intervals: energy packets “quanta”

Max Planck

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Who discovered the nucleus with the gold foil experiment

Ernest Rutherford

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Who stated that an empty slate makes up atoms

Ernest Rutherford

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What is the small dense positively charged center of a atom called

Nucleus

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Who identified protons

Ernest Rutherford

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Who found charge and mass of electrons with his oil drop experiment

Robert A. Millikan

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Who developed the Planetary model of an Atom

Niels Bohr

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Who found out that Electrons move around the nucleus at set distances

Niels Bohr

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What was the name for electrons that move around the nucleus at set distances named.

“Electron Orbitals”

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Who discovered the Neutron

James Chadwick

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