History of Atomic Models

Believed that atoms are small, hard particles that were "indivisible"

• Democritus

• Aristotle

• Schrodinger

• Greek Philosophers

Discovered that the atom has a small, dense, positively charged nucleus.

• Ernest Rutherford

• Heisenberg

• Democritus

• JJ Thomson

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Believed that electrons traveled around the nucleus in definite paths.

• Niels Bohr

• John Dalton

• Modern Atomic Theory

• Ernest Rutherford

Who first had evidence of the atom?

• Bohr

• Dalton

• Rutherford

• Thompson

Believed that all atoms of the same element would be the same.

• John Dalton

• JJ Thomson

• Niels Bohr

• Modern Atomic Theory

Who is this?

• Dalton

• Rutherford

• Democritus

• Bohr

Who's Model is this?

• Gettler

• Schrodinger

• Rutherford

• Dalton

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Who proposed the plum pudding model of the atom?

• Niels Bohr

• J.J. Thomson

• Ernest Rutherford

• John Dalton

Which experiment led to the discovery of the nucleus?

• Gold foil experiment

• Oil drop experiment

• Cathode ray experiment

• Photoelectric effect

What was the main conclusion of Rutherford's gold foil experiment?

• Atoms are indivisible

• Electrons orbit the nucleus

• Atoms have a dense central nucleus

• Atoms are mostly empty space

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