Questions and Answers
Who proposed the billiard ball model of the atom?
John Dalton
What did Dalton consider about the atoms of an element?
They have identical properties in size and mass
Who experimented with gas discharge tubes and discovered cathode rays?
William Crookes
What did William Crookes discover when the high-voltage current was turned on in the gas discharge tubes?
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What did Dalton imagine all atoms to be like in his atomic model?
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Study Notes
Atomic Models
- Dalton proposed the billiard ball model of the atom
Dalton's Atomic Theory
- Dalton considered that atoms of an element are identical in mass, size, and properties
Cathode Rays
- J.J. Thomson experimented with gas discharge tubes and discovered cathode rays
- William Crookes discovered that when a high-voltage current was turned on in the gas discharge tubes, the cathode rays produced a fluorescent glow on the glass wall of the tube
Dalton's Atomic Model
- Dalton imagined all atoms to be like small, solid, and indivisible particles, similar to billiard balls
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