The Scientist Behind the Atom Quiz

Which philosopher below was the first to suggest the existence of atoms based on the observation he made while breaking seashells?

• Democritus

• J.J. Thomson

• Rutherford

• Bohr

Which of the 4 postulates below was not proposed by John Dalton?

• Atoms combine in whole ratios

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

• Electrons exist in energy levels around the atom.

• 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. Thomson

• Democritus

What experiment was used to discover electrons?

• Cathode Ray Tube

• Gold Foil

• Chromatography

• Gel Electrophorese

Who discovered electrons?

• Rutherford

• Bohr

• J.J. Thomson

• Democritus

Which Scientist was the first to propose the idea that atoms are actually mostly empty space?

• JJ Thomson

• Ernest Rutherford

• Niels Bohr

• John Dalton

J.J. Thomson used a cathode ray tube to find what particle in the atom?

• Proton
• Neutron
• Electron