
2.2 Atomic Theory History Review
Flashcard
•
Science
•
12th Grade
•
Practice Problem
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is the Plum Pudding Model?
Back
A model proposed by J.J. Thomson that describes the atom as a sphere of positive charge with negatively charged electrons embedded within it.
2.
FLASHCARD QUESTION
Front
Who proposed the discovery of the nucleus?
Back
Ernest Rutherford is credited with proposing the discovery of the nucleus through his gold foil experiment.
3.
FLASHCARD QUESTION
Front
What is John Dalton's atomic theory?
Back
John Dalton proposed that atoms are small, dense, solid spheres that combine in fixed ratios to form compounds.
4.
FLASHCARD QUESTION
Front
Who discovered the electron?
Back
J.J. Thomson is known for discovering the electron through his cathode ray experiments.
5.
FLASHCARD QUESTION
Front
What is the Planetary Model of the atom?
Back
The Planetary Model, proposed by Niels Bohr, describes electrons orbiting the nucleus in defined paths, similar to planets orbiting the sun.
6.
FLASHCARD QUESTION
Front
What did Democritus contribute to atomic theory?
Back
Democritus was one of the first to propose that matter is made up of small, indivisible particles called atoms.
7.
FLASHCARD QUESTION
Front
What is the significance of Ernest Rutherford's gold foil experiment?
Back
Rutherford's experiment demonstrated that atoms have a small, dense nucleus, leading to the nuclear model of the atom.
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