Lesson 1 History of the Atom

Who was the first person to "think" of an atom?

• Democritus

• J.J. Thompson

• Rutherford

• Bohr

What experiment was used to discover the nucleus?

• Cathode Ray Tube

• Gold Foil

• Chromatography

• Gel Electrophorese

Dalton had 4 points about an atom, which is NOT one?

• Atoms combine in whole ratios

• An atom of one element will never turn into an atom of another

• Electrons have a set size and path

• Atoms are indivisible

Which one of these is Dalton's Model?

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Which model was created after the discovery of the nucleus?

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Which model was created after the discovery of the electron cloud?

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Who discovered the nucleus?

• Rutherford

• Bohr

• J.J. Thompson

• Democritus

What experiment was used to discover electrons?

• Cathode Ray Tube

• Gold Foil

• Chromatography

• Gel Electrophorese

Who discovered electrons?

• Rutherford

• Bohr

• J.J. Thompson

• Democritus

Which model was created after the discovery of electrons?

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