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Questions and Answers
What did William Crookes' development of the cathode ray tube primarily demonstrate?
J.J. Thomson's plum pudding model was significant because it proposed which of the following?
What did Robert Millikan's oil drop experiment primarily determine?
Which discovery did Eugen Goldstein contribute to atomic theory?
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What was a key conclusion of Rutherford's gold foil experiment?
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In the diagrams of atomic models, which of the following represents Thomson's model?
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James Chadwick is credited with the discovery of which subatomic particle?
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What characteristic does a neutron have compared to a proton?
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Study Notes
Cathode Ray Tube
- Developed by William Crookes in 1879
- Cathode rays impart a negative charge to objects they strike
- Cathode rays are deflected by electric and magnetic fields
Thomson's Plum Pudding Atom Model
- Developed by J.J. Thompson in 1897
- Thomson discovered electrons
- Electrons are embedded within a positively charged "pudding"
Oil Drop Experiment
- Developed by Robert Millikan
- Millikan determined the charge of an electron
- Millikan calculated the mass of an electron
Canal Rays
- Developed by Eugen Goldstein
- Canal rays consist of positive ions, which led to the discovery of protons
- Canal rays are composed of positively charged particles
Neutron Discovery
- Developed by James Chadwick
- Chadwick discovered neutrons
- Neutrons are subatomic particles with no charge and mass similar to protons
Rutherford's Gold Foil Experiment
- Developed by Ernest Rutherford
- Rutherford determined that the atom's positive charge and most of its mass are concentrated in a very small, dense nucleus
- Rutherford used alpha particles
- Rutherford tested scattering of alpha particles off a thin sheet of gold foil
Diagrams
- A diagram shows Rutherford's atomic model with a central nucleus containing protons and neutrons
- Electrons are shown orbiting the nucleus
- A diagram shows Thomson's plum pudding model with electrons embedded in a sphere of positive charge
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Description
This quiz covers fundamental experiments and theories in atomic physics, focusing on the discovery and characteristics of subatomic particles. Topics include cathode rays, the plum pudding model, the oil drop experiment, canal rays, neutrons, and Rutherford's gold foil experiment. Test your knowledge on these significant scientific advancements!
