History of Atom

A small positive core with small negative particles circling it.

• Description of Bohr Model

• Description of Rutherford Model

• Description of Thompson Model

• Description of Modern Model

Experiment that showed atoms contained particles that were negatively charged.

• Cathode Ray

• Gold Foil

• Oil Drop

• Particle accelerator

Proposed that electrons move around the nucleus in specific layers, or shells.

• Bohr

• Rutherford

• Chadwick

• Thomson

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Who discovered the electron?

• Niels Bohr
• Democritus
• Joseph Thomson
• John Dalton

Who performed the Gold Foil Experiment?

• J. J. Thomson
• Ernest Rutherford
• Neils Bohr
• John Dalton

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Which model is this?

• Thomson Model
• Cloud Model
• Bohr Model
• Rutherford Model

What does Heisenberg's Uncertainty Principle state?

• It is impossible to simultaneously know both the exact position and exact momentum of a particle.
• It describes that electrons only act like a particle

• The principle states that energy and time cannot be known simultaneously.
• It IS possible to know both the exact position and exact momentum of a particle.

Which experiment led to the discovery of the nucleus?

• Gold Foil Experiment

• Cathode Ray Experiment

• Oil Drop Experiment

• Double-slit Experiment

Who proposed the quantum mechanical model of the atom?

• Erwin Schrödinger

• Albert Einstein

• Niels Bohr

• James Chadwick

Who proposed the plum pudding model of the atom?

• Ernest Rutherford

• Niels Bohr

• J. J. Thomson

• James Chadwick