Atomic Theory

Flashcard
•
Chemistry
•
10th Grade
•
Hard
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8 questions
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1.
FLASHCARD QUESTION
Front
What was John Dalton's contribution to the atomic theory?
Back
John Dalton contributed to the atomic theory by proposing that matter is composed of indivisible atoms.
2.
FLASHCARD QUESTION
Front
What was JJ Thompson's contribution to the atomic theory?
Back
JJ Thompson contributed to atomic theory by discovering the electron and proposing the plum pudding model.
3.
FLASHCARD QUESTION
Front
Ernest __________ was the scientist who discovered the nucleus.
Back
Rutherford
4.
FLASHCARD QUESTION
Front
Which experiment was Ernest Rutherford known for?
Back
Gold foil experiment
5.
FLASHCARD QUESTION
Front
What was James Chadwick's contribution to the atomic theory?
Back
James Chadwick discovered that the neutron has a neutral charge.
6.
FLASHCARD QUESTION
Front
What was Neils Bohr's contribution to the atomic theory?
Back
Concluded that electrons are located in planet-like orbits around the nucleus in certain energy levels.
7.
FLASHCARD QUESTION
Front
What was concluded in the modern atomic theory?
Back
Electrons do not orbit the nucleus in neat planet-like orbits but move at high speeds in an electron cloud around the nucleus.
8.
FLASHCARD QUESTION
Front
Since atoms are too small to see, we need a scientific tool known as a __________.
Back
microscope
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