Electron Discovery and Atomic Theories
Flashcard
•
Chemistry
•
11th Grade
•
Hard
Wayground Content
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15 questions
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1.
FLASHCARD QUESTION
Front
What is the concept of 'atomos'?
Back
The term 'atomos' means 'indivisible' and refers to the idea that matter can be divided only to a certain point, beyond which it cannot be divided further. This concept was introduced by Democritus.
2.
FLASHCARD QUESTION
Front
Who proposed the first atomic theory?
Back
John Dalton proposed the first atomic theory, which stated that all matter is made up of atoms, which are indivisible and indestructible.
3.
FLASHCARD QUESTION
Front
What is the Plum Pudding Model?
Back
The Plum Pudding Model, proposed by J.J. Thomson, describes the atom as a sphere of positive charge with negatively charged electrons embedded within it, resembling a 'plum pudding'.
4.
FLASHCARD QUESTION
Front
What did Rutherford's gold foil experiment demonstrate?
Back
Rutherford's gold foil experiment demonstrated that atoms have a small, dense nucleus that is positively charged, leading to the nuclear model of the atom.
5.
FLASHCARD QUESTION
Front
What is the significance of the Bohr model?
Back
The Bohr model introduced the idea that electrons travel in fixed orbits around the nucleus and that energy levels are quantized.
6.
FLASHCARD QUESTION
Front
How does the Schrodinger model differ from the Bohr model?
Back
The Schrodinger model suggests that electrons do not travel in fixed orbits but rather exist in probabilistic clouds or orbitals around the nucleus.
7.
FLASHCARD QUESTION
Front
What are electrons?
Back
Electrons are negatively charged subatomic particles that orbit the nucleus of an atom.
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